depend on unstable

pyproject.toml

@@ -25,7 +25,8 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
 dependencies = [
-  "farm-haystack"
+  # until Haystack 2.0 is out, we depend on the unstable branch
+  "farm-haystack@git+https://github.com/deepset-ai/haystack.git",
 ]
 
 [project.urls]
@@ -79,6 +80,9 @@ all = [
   "typing",
 ]
 
+[tool.hatch.metadata]
+allow-direct-references = true
+
 [tool.black]
 target-version = ["py37"]
 line-length = 120
@@ -163,4 +167,11 @@ minversion = "6.0"
 markers = [
   "unit: unit tests",
   "integration: integration tests"
-]
+]
+
+[[tool.mypy.overrides]]
+module = [
+  "haystack.*",
+  "pytest.*"
+]
+ignore_missing_imports = true