python3Packages.django_5_{1,2}: don't depend on pywatchman (#415400)

pkgs/development/python-modules/django/5_1.nix

@@ -33,7 +33,6 @@
   pylibmc,
   pymemcache,
   python,
-  pywatchman,
   pyyaml,
   pytz,
   redis,
@@ -108,7 +107,6 @@ buildPythonPackage rec {
     pillow
     pylibmc
     pymemcache
-    pywatchman
     pyyaml
     pytz
     redis
@@ -117,11 +115,6 @@ buildPythonPackage rec {
     tzdata
   ] ++ lib.flatten (lib.attrValues optional-dependencies);
 
-  doCheck =
-    !stdenv.hostPlatform.isDarwin
-    # pywatchman depends on folly which does not support 32bits
-    && !stdenv.hostPlatform.is32bit;
-
   preCheck = ''
     # make sure the installed library gets imported
     rm -rf django

pkgs/development/python-modules/django/5_2.nix

@@ -33,7 +33,6 @@
   pylibmc,
   pymemcache,
   python,
-  pywatchman,
   pyyaml,
   pytz,
   redis,
@@ -101,7 +100,6 @@ buildPythonPackage rec {
     pillow
     pylibmc
     pymemcache
-    pywatchman
     pyyaml
     pytz
     redis
@@ -110,11 +108,6 @@ buildPythonPackage rec {
     tzdata
   ] ++ lib.flatten (lib.attrValues optional-dependencies);
 
-  doCheck =
-    !stdenv.hostPlatform.isDarwin
-    # pywatchman depends on folly which does not support 32bits
-    && !stdenv.hostPlatform.is32bit;
-
   preCheck = ''
     # make sure the installed library gets imported
     rm -rf django
@@ -132,7 +125,8 @@ buildPythonPackage rec {
     runHook preCheck
 
     pushd tests
-    ${python.interpreter} runtests.py --settings=test_sqlite
+    # without --parallel=1, tests fail with an "unexpected error due to a database lock" on Darwin
+    ${python.interpreter} runtests.py --settings=test_sqlite ${lib.optionalString stdenv.hostPlatform.isDarwin "--parallel=1"}
     popd
 
     runHook postCheck