diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d8df66..1af999b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+<!-- next-header -->
+## [Unreleased] - ReleaseDate
+### Added
+- `cfg()` dependendent crates can now be ignored by specifying only the `targets = []` you actually build for
+- `build` and `dev` dependencies can now be optionally ignored
+
+### Fixed
+- The `used_by` list of crates that use a particular license are now always sorted lexicographically
 
 ## [0.1.1] - 2019-12-12
 ### Fixed
@@ -18,7 +25,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Initial add of the thing
 
+<!-- next-url -->
 [Unreleased]: https://github.com/EmbarkStudios/cargo-about/compare/0.1.1...HEAD
-[0.1.1]: https://github.com/EmbarkStudios/tame-oauth/compare/0.1.0...0.1.1
-[0.1.0]: https://github.com/EmbarkStudios/tame-oauth/compare/0.0.1...0.1.0
+[0.1.1]: https://github.com/EmbarkStudios/cargo-about/compare/0.1.0...0.1.1
+[0.1.0]: https://github.com/EmbarkStudios/cargo-about/compare/0.0.1...0.1.0
 [0.0.1]: https://github.com/EmbarkStudios/cargo-about/releases/tag/0.0.1
diff --git a/Cargo.lock b/Cargo.lock
index 345ab6f..6870eb8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,7 +5,7 @@ name = "aho-corasick"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -16,6 +16,14 @@ dependencies = [
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.26"
@@ -23,26 +31,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "askalono"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rmp-serde 0.13.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-normalization 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "zstd 0.4.28+zstd.1.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zstd 0.5.1+zstd.1.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "atty"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -52,9 +61,14 @@ name = "autocfg"
 version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "backtrace"
-version = "0.3.40"
+version = "0.3.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -68,7 +82,7 @@ name = "backtrace-sys"
 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -98,10 +112,10 @@ dependencies = [
 
 [[package]]
 name = "bstr"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -118,15 +132,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "cargo-about"
 version = "0.1.1"
 dependencies = [
- "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ansi_term 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "anyhow 1.0.26 (registry+https://github.com/rust-lang/crates.io-index)",
- "askalono 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cargo_metadata 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "askalono 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "fern 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "handlebars 2.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ignore 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "license 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ignore 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "krates 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "license 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -150,11 +164,18 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.48"
+version = "1.0.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "jobserver 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-expr"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "jobserver 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -167,8 +188,8 @@ name = "chrono"
 version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -178,7 +199,7 @@ version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -188,10 +209,10 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.3.9"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -218,19 +239,11 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.6.6"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -261,7 +274,7 @@ name = "failure"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -270,9 +283,9 @@ name = "failure_derive"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -290,6 +303,11 @@ dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fixedbitset"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "fnv"
 version = "1.0.6"
@@ -303,16 +321,6 @@ dependencies = [
  "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "glob"
 version = "0.3.0"
@@ -324,10 +332,10 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "bstr 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bstr 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -342,7 +350,7 @@ dependencies = [
  "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "walkdir 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -363,7 +371,7 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -371,19 +379,27 @@ dependencies = [
 
 [[package]]
 name = "ignore"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-channel 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "globset 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "same-file 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "same-file 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "walkdir 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -393,12 +409,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "jobserver"
-version = "0.1.17"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "krates"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cargo_metadata 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-expr 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "petgraph 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -413,7 +438,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "license"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -431,7 +456,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "memchr"
-version = "2.2.1"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -444,27 +469,27 @@ dependencies = [
 
 [[package]]
 name = "num-integer"
-version = "0.1.41"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.10"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.11.1"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hermit-abi 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -497,9 +522,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "pest 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "pest_meta 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -509,36 +534,45 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "pest 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "sha-1 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha-1 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "petgraph"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indexmap 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro-error"
-version = "0.4.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro-error-attr 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-error-attr 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustversion 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustversion 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro-error-attr"
-version = "0.4.3"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustversion 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustversion 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn-mid 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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@@ -554,7 +588,7 @@ name = "quote"
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -573,10 +607,10 @@ version = "1.7.0"
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- "crossbeam-queue 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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- "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -586,27 +620,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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-version = "1.3.1"
+version = "1.3.3"
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- "regex-syntax 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-version = "0.6.12"
+version = "0.6.13"
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 [[package]]
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- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -615,7 +649,7 @@ version = "0.13.7"
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- "rmp 0.8.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rmp 0.8.9 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -634,12 +668,12 @@ dependencies = [
 
 [[package]]
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -649,10 +683,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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-version = "1.0.5"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -687,9 +721,9 @@ name = "serde_derive"
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -704,7 +738,7 @@ dependencies = [
 
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@@ -724,7 +758,7 @@ version = "0.3.0"
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@@ -749,18 +783,18 @@ version = "0.4.1"
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-error 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -770,9 +804,9 @@ name = "syn-mid"
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
@@ -780,9 +814,9 @@ name = "synstructure"
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- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -796,7 +830,7 @@ dependencies = [
 
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@@ -860,19 +894,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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- "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
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@@ -889,7 +918,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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@@ -902,27 +931,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
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 [[package]]
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 [[package]]
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@@ -930,28 +959,30 @@ dependencies = [
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@@ -1029,12 +1063,11 @@ dependencies = [
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diff --git a/Cargo.toml b/Cargo.toml
index f7b7321..a85d450 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,19 +23,19 @@ name = "cargo-about"
 path = "src/cargo-about/main.rs"
 
 [dependencies]
-ansi_term = "0.11.0"
+ansi_term = "0.12.1"
 anyhow = "1.0.26"
-askalono = "0.4.0"
-cargo_metadata = "0.9.0"
-chrono = "0.4.9"
+askalono = "0.4.1"
+chrono = "0.4.10"
 fern = "0.5.9"
 handlebars = "2.0.4"
-ignore = "0.4.10"
+ignore = "0.4.11"
+krates = "0.1.0"
 license = "1.0.0"
 log = "0.4.8"
 rayon = "1.3.0"
-serde = { version = "1.0.102", features = ["derive"] }
-serde_json = "1.0.41"
+serde = { version = "1.0.104", features = ["derive"] }
+serde_json = "1.0.44"
 smallvec = "1.1.0"
 spdx = "0.3.0"
 structopt = "0.3.8"
diff --git a/README.md b/README.md
index eeac764..d24a9af 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Cargo plugin for generating a listing of all of the crates used by a root crate,
 
 ### Installing
 
-```
+```bash
 cargo install cargo-about
 ```
 
@@ -31,12 +31,42 @@ cargo about generate about.hbs > license.html
 
 Priority list of all the accepted licenses for a project. `cargo-about` will try to satisfy the licenses in the order that they are declared in this list.
 
-```toml
+```ini
 accepted = [
     "Apache-2.0",
     "MIT",
 ]
 ```
+
+### `[targets]`
+
+A list of targets that are actually building for. Crates which are only included via `cfg()` expressions that don't match one or more of the listed targets will be ignored.
+
+```ini
+targets = [
+    "x86_64-unknown-linux-gnu",
+    "x86_64-unknown-linux-musl",
+    "x86_64-pc-windows-msvc",
+    "x86_64-apple-darwin",
+]
+```
+
+### `ignore-build-dependencies`
+
+If true, all crates that are only used as build dependencies will be ignored.
+
+```ini
+ignore-build-dependencies = true
+```
+
+### `ignore-dev-dependencies`
+
+If true, all crates that are only used as dev dependencies will be ignored.
+
+```ini
+ignore-dev-dependencies = true
+```
+
 ### `[[DEPENDENCY.additional]]`
 * `root` Name of the root folder
 * `license` Name of the license. Has to be parsable from SPDX, see https://spdx.org/licenses/
@@ -45,7 +75,7 @@ accepted = [
 * `license-end` The ending line number of the license in the specified license file
 
 
-```toml
+```ini
 # Example
 [[physx-sys.additional]]
 root = "PhysX"
@@ -61,8 +91,7 @@ Sometimes libraries include licenses for example code that you don't want to use
 * `license` Name of the license that you want to ingore. Has to be parsable from SPDX, see https://spdx.org/licenses/
 * `license-file` The path to the license file where the license is specified
 
-```toml
-# Example
+```ini
 [[imgui-sys.ignore]]
 license = "Zlib"
 license-file = "third-party/cimgui/imgui/examples/libs/glfw/COPYING.txt"
diff --git a/about.toml b/about.toml
index 31a6641..4996d3c 100644
--- a/about.toml
+++ b/about.toml
@@ -2,3 +2,11 @@ accepted = [
     "Apache-2.0",
     "MIT",
 ]
+targets = [
+    "x86_64-unknown-linux-gnu",
+    "x86_64-unknown-linux-musl",
+    "x86_64-pc-windows-msvc",
+    "x86_64-apple-darwin",
+]
+ignore-build-dependencies = false
+ignore-dev-dependencies = false
diff --git a/deny.toml b/deny.toml
index ccb037b..50d81f2 100644
--- a/deny.toml
+++ b/deny.toml
@@ -5,8 +5,10 @@ deny = [
     { name = "openssl-sys" },
 ]
 skip = [
-    # ignore uses an old crossbeam-channel
-    { name = "crossbeam-utils", version = "=0.6.6" },
+    # clap uses old ansi-term
+    { name = "ansi_term", version = "0.11.0" },
+    # crossbeam uses an old autocfg
+    { name = "autocfg", version = "0.1.7" },
 ]
 
 [licenses]
diff --git a/release.toml b/release.toml
new file mode 100644
index 0000000..ef51b77
--- /dev/null
+++ b/release.toml
@@ -0,0 +1,11 @@
+pre-release-commit-message = "Release {{version}}"
+no-dev-version = true
+tag-message = "Release {{version}}"
+tag-name = "{{version}}"
+pre-release-replacements = [
+  { file = "CHANGELOG.md", search = "Unreleased", replace = "{{version}}" },
+  { file = "CHANGELOG.md", search = "\\.\\.\\.HEAD", replace = "...{{tag_name}}" },
+  { file = "CHANGELOG.md", search = "ReleaseDate", replace = "{{date}}" },
+  { file = "CHANGELOG.md", search = "<!-- next-header -->", replace = "<!-- next-header -->\n## [Unreleased] - ReleaseDate" },
+  { file = "CHANGELOG.md", search = "<!-- next-url -->", replace = "<!-- next-url -->\n[Unreleased]: https://github.com/EmbarkStudios/cargo-about/compare/{{tag_name}}...HEAD" },
+]
diff --git a/src/cargo-about/generate.rs b/src/cargo-about/generate.rs
index 30e1075..d7ebdd9 100644
--- a/src/cargo-about/generate.rs
+++ b/src/cargo-about/generate.rs
@@ -1,5 +1,5 @@
 use anyhow::{bail, Context, Error};
-use cargo_about::{licenses, Krate, Krates};
+use cargo_about::{licenses, Krates};
 use handlebars::Handlebars;
 use serde::Serialize;
 use std::{collections::BTreeMap, path::PathBuf};
@@ -111,7 +111,7 @@ pub fn cmd(
 
     let summary = licenses::Gatherer::with_store(std::sync::Arc::new(store))
         .with_confidence_threshold(args.threshold)
-        .gather(&krates.krates, &cfg);
+        .gather(&krates, &cfg);
 
     let resolved = licenses::Resolved::resolve(&summary.nfos, &cfg.accepted)?;
     let output = generate(&summary.nfos, &resolved, &registry, &template)?;
@@ -124,7 +124,7 @@ pub fn cmd(
 #[derive(Clone, Serialize)]
 struct UsedBy<'a> {
     #[serde(rename = "crate")]
-    krate: &'a Krate,
+    krate: &'a krates::cm::Package,
     path: Option<PathBuf>,
 }
 
@@ -235,6 +235,11 @@ fn generate(
             .flat_map(|(_, v)| v.into_iter().map(|(_, v)| v))
             .collect::<Vec<_>>();
 
+        // Sort the used_by krates lexicographically
+        for lic in &mut licenses {
+            lic.used_by.sort_by(|a, b| a.krate.id.cmp(&b.krate.id));
+        }
+
         licenses.sort_by(|a, b| a.id.cmp(&b.id));
         licenses
     };
diff --git a/src/cargo-about/init.rs b/src/cargo-about/init.rs
index 8eab0ca..0ddf5e1 100644
--- a/src/cargo-about/init.rs
+++ b/src/cargo-about/init.rs
@@ -16,9 +16,7 @@ pub struct Args {
 }
 
 pub fn cmd(args: Args) -> Result<(), Error> {
-    let root_path = cargo_metadata::MetadataCommand::new()
-        .exec()?
-        .workspace_root;
+    let root_path = krates::cm::MetadataCommand::new().exec()?.workspace_root;
     let with_handlebars = !args.no_handlebars;
 
     if with_handlebars {
diff --git a/src/cargo-about/main.rs b/src/cargo-about/main.rs
index bd4a513..db0d13d 100644
--- a/src/cargo-about/main.rs
+++ b/src/cargo-about/main.rs
@@ -44,7 +44,7 @@ Possible values:
     log_level: log::LevelFilter,
     /// Space-separated list of features to activate
     #[structopt(long)]
-    features: Option<String>,
+    features: Vec<String>,
     /// Activate all available features
     #[structopt(long)]
     all_features: bool,
@@ -156,10 +156,11 @@ fn real_main() -> Result<(), Error> {
         || {
             log::info!("gathering crates for {}", manifest_path.display());
             cargo_about::get_all_crates(
-                &manifest_path,
+                manifest_path,
                 args.no_default_features,
                 args.all_features,
-                args.features.as_ref().map(|s| s.as_str()),
+                args.features.clone(),
+                &cfg,
             )
         },
         || {
@@ -171,7 +172,7 @@ fn real_main() -> Result<(), Error> {
     let all_crates = all_crates?;
     let store = store?;
 
-    log::info!("gathered {} crates", all_crates.krates.len());
+    log::info!("gathered {} crates", all_crates.len());
 
     match args.cmd {
         Command::Generate(gen) => generate::cmd(gen, cfg, all_crates, store),
diff --git a/src/lib.rs b/src/lib.rs
index 9f0d9d1..503d05c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,78 +1,86 @@
 #![warn(clippy::all)]
 #![warn(rust_2018_idioms)]
 
-use anyhow::{Context, Error};
-use std::{collections::HashMap, path::Path};
-
-pub type Pid = cargo_metadata::PackageId;
-pub type Krate = cargo_metadata::Package;
+use anyhow::Error;
+use krates::cm;
+use std::fmt;
 
 pub mod licenses;
 
-pub struct Krates {
-    pub krates: Vec<Krate>,
-    pub krate_map: HashMap<Pid, usize>,
-    pub resolved: cargo_metadata::Resolve,
-    //pub lock_file: PathBuf,
+pub struct Krate(cm::Package);
+
+impl From<cm::Package> for Krate {
+    fn from(mut pkg: cm::Package) -> Self {
+        // Fix the license field as cargo used to allow the
+        // invalid / separator
+        if let Some(ref mut lf) = pkg.license {
+            *lf = lf.replace("/", " OR ");
+        }
+
+        Self(pkg)
+    }
+}
+
+impl fmt::Display for Krate {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{} {}", self.0.name, self.0.version)
+    }
+}
+
+impl std::ops::Deref for Krate {
+    type Target = cm::Package;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
 }
 
-pub fn get_all_crates<P: AsRef<Path>>(
-    cargo_toml: P,
+pub type Krates = krates::Krates<Krate>;
+
+pub fn get_all_crates(
+    cargo_toml: std::path::PathBuf,
     no_default_features: bool,
     all_features: bool,
-    features: Option<&str>,
+    features: Vec<String>,
+    cfg: &licenses::config::Config,
 ) -> Result<Krates, Error> {
-    use rayon::prelude::*;
-
-    let metadata = {
-        let mut mdc = cargo_metadata::MetadataCommand::new();
-        mdc.manifest_path(cargo_toml);
-
-        // The metadata command builder is weird and only allows you to specify
-        // one of these, but really you might need to do multiple of them
-        if no_default_features {
-            mdc.other_options(["--no-default-features".to_owned()]);
-        }
+    let mut mdc = krates::Cmd::new();
+    mdc.manifest_path(cargo_toml);
 
-        if all_features {
-            mdc.other_options(["--all-features".to_owned()]);
-        }
+    // The metadata command builder is weird and only allows you to specify
+    // one of these, but really you might need to do multiple of them
+    if no_default_features {
+        mdc.no_default_features();
+    }
 
-        if let Some(fts) = features {
-            mdc.other_options(["--features".to_owned(), fts.to_owned()]);
-        }
+    if all_features {
+        mdc.all_features();
+    }
 
-        mdc.exec().context("failed to fetch metadata")?
-    };
+    mdc.features(features);
 
-    let mut krates = metadata.packages;
+    let mut builder = krates::Builder::new();
 
-    for krate in &mut krates {
-        if let Some(ref mut lf) = krate.license {
-            *lf = lf.replace("/", " OR ");
-        }
+    if cfg.ignore_build_dependencies {
+        builder.ignore_kind(krates::DepKind::Build, krates::Scope::All);
     }
 
-    krates.par_sort_by(|a, b| a.id.cmp(&b.id));
-
-    let map = krates
-        .iter()
-        .enumerate()
-        .map(|(i, ci)| (ci.id.clone(), i))
-        .collect();
+    if cfg.ignore_dev_dependencies {
+        builder.ignore_kind(krates::DepKind::Dev, krates::Scope::All);
+    }
 
-    let mut resolved = metadata.resolve.unwrap();
+    builder.include_targets(cfg.targets.iter().map(|triple| (triple.as_str(), vec![])));
 
-    resolved.nodes.par_sort_by(|a, b| a.id.cmp(&b.id));
-    resolved
-        .nodes
-        .par_iter_mut()
-        .for_each(|nodes| nodes.dependencies.par_sort());
+    let graph = builder.build(mdc, |filtered: cm::Package| match filtered.source {
+        Some(src) => {
+            if src.is_crates_io() {
+                log::debug!("filtered {} {}", filtered.name, filtered.version);
+            } else {
+                log::debug!("filtered {} {} {}", filtered.name, filtered.version, src);
+            }
+        }
+        None => log::debug!("filtered crate {} {}", filtered.name, filtered.version),
+    })?;
 
-    Ok(Krates {
-        krates,
-        krate_map: map,
-        resolved,
-        //lock_file: root.as_ref().join("Cargo.lock"),
-    })
+    Ok(graph)
 }
diff --git a/src/licenses/config.rs b/src/licenses/config.rs
index 0909f69..b02bcbf 100644
--- a/src/licenses/config.rs
+++ b/src/licenses/config.rs
@@ -69,7 +69,7 @@ where
 }
 
 #[derive(Deserialize, Debug)]
-#[serde(rename_all = "kebab-case")]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct Additional {
     pub root: PathBuf,
     #[serde(deserialize_with = "deserialize_spdx_id")]
@@ -80,7 +80,7 @@ pub struct Additional {
 }
 
 #[derive(Deserialize, Debug)]
-#[serde(rename_all = "kebab-case")]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct Ignore {
     #[serde(deserialize_with = "deserialize_spdx_id")]
     pub license: spdx::LicenseId,
@@ -90,6 +90,7 @@ pub struct Ignore {
 }
 
 #[derive(Deserialize, Debug)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct KrateConfig {
     #[serde(default)]
     pub additional: Vec<Additional>,
@@ -98,10 +99,21 @@ pub struct KrateConfig {
 }
 
 #[derive(Deserialize, Debug, Default)]
+#[serde(rename_all = "kebab-case")]
 pub struct Config {
+    /// Only includes dependencies that match at least one of the specified
+    /// targets
+    #[serde(default)]
+    pub targets: Vec<String>,
+    /// Ignores any build dependencies in the graph
+    #[serde(default)]
+    pub ignore_build_dependencies: bool,
+    /// Ignores any dev dependencies in the graph
+    #[serde(default)]
+    pub ignore_dev_dependencies: bool,
     /// The list of licenses we will use for all crates, in priority order
     #[serde(deserialize_with = "deserialize_licensee")]
     pub accepted: Vec<spdx::Licensee>,
     #[serde(flatten)]
-    pub inner: BTreeMap<String, KrateConfig>,
+    pub crates: BTreeMap<String, KrateConfig>,
 }
diff --git a/src/licenses/mod.rs b/src/licenses/mod.rs
index 7178f72..358b1c7 100644
--- a/src/licenses/mod.rs
+++ b/src/licenses/mod.rs
@@ -1,4 +1,4 @@
-use crate::Krate;
+use crate::{Krate, Krates};
 use anyhow::{bail, Context, Error};
 use rayon::prelude::*;
 use spdx::{LicenseId, LicenseItem, LicenseReq, Licensee};
@@ -100,7 +100,7 @@ impl Gatherer {
         self
     }
 
-    pub fn gather<'k>(self, krates: &'k [crate::Krate], cfg: &config::Config) -> Summary<'k> {
+    pub fn gather<'k>(self, krates: &'k Krates, cfg: &config::Config) -> Summary<'k> {
         let mut summary = Summary::new(self.store);
 
         let threshold = self.threshold;
@@ -116,9 +116,11 @@ impl Gatherer {
             .optimize(false)
             .max_passes(1);
 
-        krates
-            .par_iter()
-            .map(|krate| {
+        summary.nfos = krates
+            .krates()
+            .par_bridge()
+            .map(|kn| {
+                let krate = &kn.krate;
                 let info = match krate.license {
                     Some(ref license_field) => {
                         //. Reasons this can fail:
@@ -151,7 +153,7 @@ impl Gatherer {
                 };
 
                 let root_path = krate.manifest_path.parent().unwrap();
-                let krate_cfg = cfg.inner.get(&krate.name);
+                let krate_cfg = cfg.crates.get(&krate.name);
 
                 let mut license_files = match scan_files(
                     &root_path,
@@ -210,7 +212,7 @@ impl Gatherer {
                     license_files,
                 }
             })
-            .collect_into_vec(&mut summary.nfos);
+            .collect();
 
         summary
     }