python: pytest_37: init at 3.7.4

Needed at least by pyjwt.

pkgs/development/python-modules/pytest/default.nix

@@ -2,46 +2,59 @@
 , setuptools_scm, setuptools, six, pluggy, funcsigs, isPy3k, more-itertools
 , atomicwrites, mock, writeText, pathlib2
 }:
-buildPythonPackage rec {
-  version = "3.9.3";
-  pname = "pytest";
 
-  preCheck = ''
+let generic = { version, sha256 }:
-    # don't test bash builtins
+  buildPythonPackage rec {
-    rm testing/test_argcomplete.py
+    pname = "pytest";
-  '';
+    inherit version;
 
-  src = fetchPypi {
+    preCheck = ''
-    inherit pname version;
+      # don't test bash builtins
+      rm testing/test_argcomplete.py
+    '';
+
+    src = fetchPypi {
+      inherit pname version sha256;
+    };
+
+    checkInputs = [ hypothesis mock ];
+    buildInputs = [ setuptools_scm ];
+    propagatedBuildInputs = [ attrs py setuptools six pluggy more-itertools atomicwrites]
+      ++ stdenv.lib.optionals (!isPy3k) [ funcsigs ]
+      ++ stdenv.lib.optionals (pythonOlder "3.6") [ pathlib2 ];
+
+    checkPhase = ''
+      runHook preCheck
+      $out/bin/py.test -x testing/
+      runHook postCheck
+    '';
+
+    # Remove .pytest_cache when using py.test in a Nix build
+    setupHook = writeText "pytest-hook" ''
+      pytestcachePhase() {
+          find $out -name .pytest_cache -type d -exec rm -rf {} +
+      }
+
+      preDistPhases+=" pytestcachePhase"
+    '';
+
+    meta = with stdenv.lib; {
+      homepage = https://docs.pytest.org;
+      description = "Framework for writing tests";
+      maintainers = with maintainers; [ domenkozar lovek323 madjar lsix ];
+      license = licenses.mit;
+      platforms = platforms.unix;
+    };
+  };
+
+in {
+  pytest_39 = generic {
+    version = "3.9.3";
     sha256 = "a9e5e8d7ab9d5b0747f37740276eb362e6a76275d76cebbb52c6049d93b475db";
   };
 
-  checkInputs = [ hypothesis mock ];
+  pytest_37 = generic {
-  buildInputs = [ setuptools_scm ];
+    version = "3.7.4";
-  propagatedBuildInputs = [ attrs py setuptools six pluggy more-itertools atomicwrites]
+    sha256 = "2d7c49e931316cc7d1638a3e5f54f5d7b4e5225972b3c9838f3584788d27f349";
-    ++ stdenv.lib.optionals (!isPy3k) [ funcsigs ]
-    ++ stdenv.lib.optionals (pythonOlder "3.6") [ pathlib2 ];
-
-  checkPhase = ''
-    runHook preCheck
-    $out/bin/py.test -x testing/
-    runHook postCheck
-  '';
-
-  # Remove .pytest_cache when using py.test in a Nix build
-  setupHook = writeText "pytest-hook" ''
-    pytestcachePhase() {
-        find $out -name .pytest_cache -type d -exec rm -rf {} +
-    }
-
-    preDistPhases+=" pytestcachePhase"
-  '';
-
-  meta = with stdenv.lib; {
-    homepage = https://docs.pytest.org;
-    description = "Framework for writing tests";
-    maintainers = with maintainers; [ domenkozar lovek323 madjar lsix ];
-    license = licenses.mit;
-    platforms = platforms.unix;
   };
 }

pkgs/top-level/python-packages.nix

@@ -1349,10 +1349,10 @@ in {
 
   pytest = self.pytest_39;
 
-  pytest_39 = callPackage ../development/python-modules/pytest {
+  inherit (callPackage ../development/python-modules/pytest {
     # hypothesis tests require pytest that causes dependency cycle
     hypothesis = self.hypothesis.override { doCheck = false; };
-  };
+  }) pytest_39 pytest_37;
 
   pytest-httpbin = callPackage ../development/python-modules/pytest-httpbin { };