python3Packages.cachier: unbreak (#436852)

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

@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   pythonOlder,
   fetchFromGitHub,
@@ -9,6 +10,7 @@
   portalocker,
   pytestCheckHook,
   pytest-cov-stub,
+  sqlalchemy,
   pymongo,
   dnspython,
   pymongo-inmemory,
@@ -46,6 +48,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     pytestCheckHook
     pytest-cov-stub
+    sqlalchemy
     pymongo
     dnspython
     pymongo-inmemory
@@ -67,9 +70,23 @@ buildPythonPackage rec {
     # don't test formatting
     "test_flake8"
 
+    # slow, spawns 800+ threads
+    "test_inotify_instance_limit_reached"
+
     # timing sensitive
     "test_being_calc_next_time"
     "test_pickle_being_calculated"
+  ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
+    # sensitive to host file system
+    # Unhandled exception in FSEventsEmitter -  RuntimeError: Cannot add watch - it is already scheduled
+    "test_bad_cache_file"
+    "test_delete_cache_file"
+  ];
+
+  disabledTestPaths = [
+    # Keeps breaking due to concurrent access or failing to close the db between tests.
+    "tests/test_sql_core.py"
   ];
 
   preBuild = ''