diff --git a/pkgs/development/compilers/ldc/binary.nix b/pkgs/development/compilers/ldc/binary.nix
deleted file mode 100644
index 56d40be86194b..0000000000000
--- a/pkgs/development/compilers/ldc/binary.nix
+++ /dev/null
@@ -1,41 +0,0 @@
-{ stdenv, fetchurl, curl, tzdata, autoPatchelfHook, fixDarwinDylibNames, libxml2
-, version, hashes }:
-with stdenv;
-let
-  OS = if hostPlatform.isDarwin then "osx" else hostPlatform.parsed.kernel.name;
-  ARCH = toString hostPlatform.parsed.cpu.name;
-in mkDerivation {
-  pname = "ldc-bootstrap";
-  inherit version;
-
-  src = fetchurl rec {
-    name = "ldc2-${version}-${OS}-${ARCH}.tar.xz";
-    url = "https://github.com/ldc-developers/ldc/releases/download/v${version}/${name}";
-    sha256 = hashes."${OS}-${ARCH}" or (throw "missing bootstrap sha256 for ${OS}-${ARCH}");
-  };
-
-  dontConfigure = true;
-  dontBuild = true;
-
-  nativeBuildInputs = [ fixDarwinDylibNames autoPatchelfHook ];
-
-  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libxml2 stdenv.cc.cc ];
-
-  propagatedBuildInputs = [ curl tzdata ];
-
-  installPhase = ''
-    mkdir -p $out
-
-    mv bin etc import lib LICENSE README $out/
-  '';
-
-  meta = with lib; {
-    inherit version;
-    description = "The LLVM-based D Compiler";
-    homepage = "https://github.com/ldc-developers/ldc";
-    # from https://github.com/ldc-developers/ldc/blob/master/LICENSE
-    license = with licenses; [ bsd3 boost mit ncsa gpl2Plus ];
-    maintainers = with maintainers; [ ThomasMader lionello ];
-    platforms = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" ];
-  };
-}
diff --git a/pkgs/development/compilers/ldc/bootstrap.nix b/pkgs/development/compilers/ldc/bootstrap.nix
deleted file mode 100644
index fde4c84268489..0000000000000
--- a/pkgs/development/compilers/ldc/bootstrap.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{ callPackage }:
-callPackage ./binary.nix {
-  version = "1.19.0";
-  hashes = {
-    # Get these from `nix-prefetch-url https://github.com/ldc-developers/ldc/releases/download/v1.19.0/ldc2-1.19.0-osx-x86_64.tar.xz` etc..
-    osx-x86_64 = "1bp3xkh9zp64dzq8isanib1gacb3nfbl70qv15qygwk1zan6zgy7";
-    linux-x86_64 = "146grr2lwarfk13wgkpyb77xb6b3as1is2rf4s2hipqjmc8biy1h";
-    linux-aarch64  = "1fv6jshfvi15m7masgxq1hgp216qjd5amizrqdf26vhrq3a08li3";
-  };
-}
diff --git a/pkgs/development/compilers/ldc/default.nix b/pkgs/development/compilers/ldc/default.nix
index 5a4baabcf8d87..19fe2981c8334 100644
--- a/pkgs/development/compilers/ldc/default.nix
+++ b/pkgs/development/compilers/ldc/default.nix
@@ -1,5 +1,173 @@
-import ./generic.nix {
-  version = "1.20.1";
-  ldcSha256 = "1bqsgab22v02pc3c9gcyf15y7aimadv24d68icaw5lpgnvzxy89b";
+{ stdenv, fetchurl, cmake, ninja, llvm_5, llvm_8, curl, tzdata
+, libconfig, lit, gdb, unzip, darwin, bash
+, callPackage, makeWrapper, runCommand, targetPackages
+, bootstrapVersion ? false
+, version ? "1.17.0"
+, ldcSha256 ? "1aag5jfrng6p4ms0fs90hjbv9bcj3hj8h52r68c3cm6racdajbva"
+}:
+
+let
+  bootstrapLdc = if !bootstrapVersion then
+    # LDC 0.17.x is the last version which doesn't need a working D compiler to
+    # build so we use that version to bootstrap the actual build.
+    callPackage ./default.nix {
+      bootstrapVersion = true;
+      version = "0.17.6";
+      ldcSha256 = "0qf5kbxddgmg3kqzi0kf4bgv8vdrnv16y07hcpm0cwv9mc3qr2w6";
+    }
+  else
+    "";
+
+  pathConfig = runCommand "ldc-lib-paths" {} ''
+    mkdir $out
+    echo ${tzdata}/share/zoneinfo/ > $out/TZDatabaseDirFile
+    echo ${curl.out}/lib/libcurl${stdenv.hostPlatform.extensions.sharedLibrary} > $out/LibcurlPathFile
+  '';
+in
+
+stdenv.mkDerivation rec {
+  pname = "ldc";
+  inherit version;
+
+  enableParallelBuilding = true;
+
+  src = fetchurl {
+    url = "https://github.com/ldc-developers/ldc/releases/download/v${version}/ldc-${version}-src.tar.gz";
+    sha256 = ldcSha256;
+  };
+
+  # https://issues.dlang.org/show_bug.cgi?id=19553
+  hardeningDisable = [ "fortify" ];
+
+  postUnpack = ''
+    patchShebangs .
+  ''
+
+  + stdenv.lib.optionalString (!bootstrapVersion) ''
+      rm ldc-${version}-src/tests/d2/dmd-testsuite/fail_compilation/mixin_gc.d
+      rm ldc-${version}-src/tests/d2/dmd-testsuite/runnable/xtest46_gc.d
+      rm ldc-${version}-src/tests/d2/dmd-testsuite/runnable/testptrref_gc.d
+
+      # test depends on current year
+      rm ldc-${version}-src/tests/d2/dmd-testsuite/compilable/ddocYear.d
+  ''
+
+  + stdenv.lib.optionalString (!bootstrapVersion && stdenv.hostPlatform.isDarwin) ''
+      # https://github.com/NixOS/nixpkgs/issues/34817
+      rm -r ldc-${version}-src/tests/plugins/addFuncEntryCall
+  '';
+
+  postPatch = ''
+      # Setting SHELL=$SHELL when dmd testsuite is run doesn't work on Linux somehow
+      substituteInPlace tests/d2/dmd-testsuite/Makefile --replace "SHELL=/bin/bash" "SHELL=${bash}/bin/bash"
+    ''
+
+  + stdenv.lib.optionalString (!bootstrapVersion && stdenv.hostPlatform.isLinux) ''
+      substituteInPlace runtime/phobos/std/socket.d --replace "assert(ih.addrList[0] == 0x7F_00_00_01);" ""
+  ''
+
+  + stdenv.lib.optionalString (!bootstrapVersion && stdenv.hostPlatform.isDarwin) ''
+      substituteInPlace runtime/phobos/std/socket.d --replace "foreach (name; names)" "names = []; foreach (name; names)"
+  ''
+
+  + stdenv.lib.optionalString (bootstrapVersion && stdenv.hostPlatform.isDarwin) ''
+      # Was not able to compile on darwin due to "__inline_isnanl"
+      # being undefined.
+      # TODO Remove with version > 0.17.6
+      substituteInPlace dmd2/root/port.c --replace __inline_isnanl __inline_isnan
+  '';
+
+  nativeBuildInputs = [ cmake ninja makeWrapper unzip ]
+    ++ stdenv.lib.optionals (!bootstrapVersion) [
+      bootstrapLdc lit lit.python
+    ]
+    ++ stdenv.lib.optional (!bootstrapVersion && stdenv.hostPlatform.isDarwin)
+      # https://github.com/NixOS/nixpkgs/issues/57120
+      # https://github.com/NixOS/nixpkgs/pull/59197#issuecomment-481972515
+      llvm_5
+    ++ stdenv.lib.optional (!bootstrapVersion && !stdenv.hostPlatform.isDarwin)
+      llvm_8
+    ++ stdenv.lib.optional (!bootstrapVersion && !stdenv.hostPlatform.isDarwin)
+      # https://github.com/NixOS/nixpkgs/pull/36378#issuecomment-385034818
+      gdb
+    ++ stdenv.lib.optionals (bootstrapVersion) [
+      libconfig llvm_5
+    ]
+    ++ stdenv.lib.optional stdenv.hostPlatform.isDarwin
+      darwin.apple_sdk.frameworks.Foundation;
+
+
+  buildInputs = [ curl tzdata ];
+
+  cmakeFlags = stdenv.lib.optionals (!bootstrapVersion) [
+    "-DD_FLAGS=-d-version=TZDatabaseDir;-d-version=LibcurlPath;-J${pathConfig}"
+    "-DCMAKE_BUILD_TYPE=Release"
+  ];
+
+  postConfigure = ''
+    export DMD=$PWD/bin/ldmd2
+  '';
+
+  makeFlags = [ "DMD=$DMD" ];
+
+  fixNames = stdenv.lib.optionalString stdenv.hostPlatform.isDarwin  ''
+    fixDarwinDylibNames() {
+      local flags=()
+
+      for fn in "$@"; do
+        flags+=(-change "$(basename "$fn")" "$fn")
+      done
+
+      for fn in "$@"; do
+        if [ -L "$fn" ]; then continue; fi
+        echo "$fn: fixing dylib"
+        install_name_tool -id "$fn" "''${flags[@]}" "$fn"
+      done
+    }
+
+    fixDarwinDylibNames $(find "$(pwd)/lib" -name "*.dylib")
+    export DYLD_LIBRARY_PATH=$(pwd)/lib
+  '';
+
+  # https://github.com/ldc-developers/ldc/issues/2497#issuecomment-459633746
+  additionalExceptions = stdenv.lib.optionalString stdenv.hostPlatform.isDarwin
+    "|druntime-test-shared";
+
+  doCheck = !bootstrapVersion;
+
+  checkPhase = stdenv.lib.optionalString doCheck ''
+    # Build default lib test runners
+    ninja -j$NIX_BUILD_CORES all-test-runners
+
+    ${fixNames}
+
+    # Run dmd testsuite
+    export DMD_TESTSUITE_MAKE_ARGS="-j$NIX_BUILD_CORES DMD=$DMD CC=$CXX"
+    ctest -V -R "dmd-testsuite"
+
+    # Build and run LDC D unittests.
+    ctest --output-on-failure -R "ldc2-unittest"
+
+    # Run LIT testsuite.
+    ctest -V -R "lit-tests"
+
+    # Run default lib unittests
+    ctest -j$NIX_BUILD_CORES --output-on-failure -E "ldc2-unittest|lit-tests|dmd-testsuite${additionalExceptions}"
+  '';
+
+  postInstall = ''
+    wrapProgram $out/bin/ldc2 \
+        --prefix PATH ":" "${targetPackages.stdenv.cc}/bin" \
+        --set-default CC "${targetPackages.stdenv.cc}/bin/cc"
+   '';
+
+  meta = with stdenv.lib; {
+    description = "The LLVM-based D compiler";
+    homepage = "https://github.com/ldc-developers/ldc";
+    # from https://github.com/ldc-developers/ldc/blob/master/LICENSE
+    license = with licenses; [ bsd3 boost mit ncsa gpl2Plus ];
+    maintainers = with maintainers; [ ThomasMader ];
+    platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ];
+  };
 }
 
diff --git a/pkgs/development/compilers/ldc/generic.nix b/pkgs/development/compilers/ldc/generic.nix
deleted file mode 100644
index c93d423945cbd..0000000000000
--- a/pkgs/development/compilers/ldc/generic.nix
+++ /dev/null
@@ -1,143 +0,0 @@
-{ version, ldcSha256 }:
-{ stdenv, fetchurl, cmake, ninja, llvm_5, llvm_8, curl, tzdata
-, libconfig, lit, gdb, unzip, darwin, bash
-, callPackage, makeWrapper, runCommand, targetPackages
-, ldcBootstrap ? callPackage ./bootstrap.nix { }
-}:
-
-let
-  pathConfig = runCommand "ldc-lib-paths" {} ''
-    mkdir $out
-    echo ${tzdata}/share/zoneinfo/ > $out/TZDatabaseDirFile
-    echo ${curl.out}/lib/libcurl${stdenv.hostPlatform.extensions.sharedLibrary} > $out/LibcurlPathFile
-  '';
-
-in
-
-stdenv.mkDerivation rec {
-  pname = "ldc";
-  inherit version;
-
-  enableParallelBuilding = true;
-
-  src = fetchurl {
-    url = "https://github.com/ldc-developers/ldc/releases/download/v${version}/ldc-${version}-src.tar.gz";
-    sha256 = ldcSha256;
-  };
-
-  # https://issues.dlang.org/show_bug.cgi?id=19553
-  hardeningDisable = [ "fortify" ];
-
-  postUnpack = ''
-    patchShebangs .
-  ''
-  + ''
-      rm ldc-${version}-src/tests/d2/dmd-testsuite/fail_compilation/mixin_gc.d
-      rm ldc-${version}-src/tests/d2/dmd-testsuite/runnable/xtest46_gc.d
-      rm ldc-${version}-src/tests/d2/dmd-testsuite/runnable/testptrref_gc.d
-
-      # test depends on current year
-      rm ldc-${version}-src/tests/d2/dmd-testsuite/compilable/ddocYear.d
-  ''
-  + stdenv.lib.optionalString stdenv.hostPlatform.isDarwin ''
-      # https://github.com/NixOS/nixpkgs/issues/34817
-      rm -r ldc-${version}-src/tests/plugins/addFuncEntryCall
-  '';
-
-  postPatch = ''
-    # Setting SHELL=$SHELL when dmd testsuite is run doesn't work on Linux somehow
-    substituteInPlace tests/d2/dmd-testsuite/Makefile --replace "SHELL=/bin/bash" "SHELL=${bash}/bin/bash"
-  ''
-  + stdenv.lib.optionalString stdenv.hostPlatform.isLinux ''
-      substituteInPlace runtime/phobos/std/socket.d --replace "assert(ih.addrList[0] == 0x7F_00_00_01);" ""
-  ''
-  + stdenv.lib.optionalString stdenv.hostPlatform.isDarwin ''
-      substituteInPlace runtime/phobos/std/socket.d --replace "foreach (name; names)" "names = []; foreach (name; names)"
-  '';
-
-  nativeBuildInputs = [
-    cmake ninja makeWrapper unzip ldcBootstrap lit lit.python
-  ]
-  ++ stdenv.lib.optionals stdenv.hostPlatform.isDarwin [
-    darwin.apple_sdk.frameworks.Foundation
-    # https://github.com/NixOS/nixpkgs/issues/57120
-    # https://github.com/NixOS/nixpkgs/pull/59197#issuecomment-481972515
-    llvm_5
-  ]
-  ++ stdenv.lib.optionals (!stdenv.hostPlatform.isDarwin) [
-    llvm_8
-    # https://github.com/NixOS/nixpkgs/pull/36378#issuecomment-385034818
-    gdb
-  ];
-
-  buildInputs = [ curl tzdata ];
-
-  cmakeFlags = [
-    "-DD_FLAGS=-d-version=TZDatabaseDir;-d-version=LibcurlPath;-J${pathConfig}"
-    "-DCMAKE_BUILD_TYPE=Release"
-  ];
-
-  postConfigure = ''
-    export DMD=$PWD/bin/ldmd2
-  '';
-
-  makeFlags = [ "DMD=$DMD" ];
-
-  fixNames = stdenv.lib.optionalString stdenv.hostPlatform.isDarwin  ''
-    fixDarwinDylibNames() {
-      local flags=()
-
-      for fn in "$@"; do
-        flags+=(-change "$(basename "$fn")" "$fn")
-      done
-
-      for fn in "$@"; do
-        if [ -L "$fn" ]; then continue; fi
-        echo "$fn: fixing dylib"
-        install_name_tool -id "$fn" "''${flags[@]}" "$fn"
-      done
-    }
-
-    fixDarwinDylibNames $(find "$(pwd)/lib" -name "*.dylib")
-    export DYLD_LIBRARY_PATH=$(pwd)/lib
-  '';
-
-  # https://github.com/ldc-developers/ldc/issues/2497#issuecomment-459633746
-  additionalExceptions = stdenv.lib.optionalString stdenv.hostPlatform.isDarwin
-    "|druntime-test-shared";
-
-  checkPhase = ''
-    # Build default lib test runners
-    ninja -j$NIX_BUILD_CORES all-test-runners
-
-    ${fixNames}
-
-    # Run dmd testsuite
-    export DMD_TESTSUITE_MAKE_ARGS="-j$NIX_BUILD_CORES DMD=$DMD"
-    ctest -V -R "dmd-testsuite"
-
-    # Build and run LDC D unittests.
-    ctest --output-on-failure -R "ldc2-unittest"
-
-    # Run LIT testsuite.
-    ctest -V -R "lit-tests"
-
-    # Run default lib unittests
-    ctest -j$NIX_BUILD_CORES --output-on-failure -E "ldc2-unittest|lit-tests|dmd-testsuite${additionalExceptions}"
-  '';
-
-  postInstall = ''
-    wrapProgram $out/bin/ldc2 \
-        --prefix PATH ":" "${targetPackages.stdenv.cc}/bin" \
-        --set-default CC "${targetPackages.stdenv.cc}/bin/cc"
-   '';
-
-  meta = with stdenv.lib; {
-    description = "The LLVM-based D compiler";
-    homepage = "https://github.com/ldc-developers/ldc";
-    # from https://github.com/ldc-developers/ldc/blob/master/LICENSE
-    license = with licenses; [ bsd3 boost mit ncsa gpl2Plus ];
-    maintainers = with maintainers; [ ThomasMader lionello ];
-    platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ];
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 4b2b36eb352c8..9ad282149aa6f 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -216,7 +216,6 @@ mapAliases ({
   keymon = throw "keymon has been removed from nixpkgs, as it's abandoned and archived."; # 2019-12-10
   kvm = qemu_kvm; # added 2018-04-25
   latinmodern-math = lmmath;
-  ldc2 = ldc; # added 2020-04-18
   letsencrypt = certbot; # added 2016-05-16
   libaudit = audit; # added 2018-04-25
   libcanberra_gtk2 = libcanberra-gtk2; # added 2018-02-25