diff --git a/pkgs/development/python-modules/flask-admin/default.nix b/pkgs/development/python-modules/flask-admin/default.nix
index 685c4e809459..c4d686c01478 100644
--- a/pkgs/development/python-modules/flask-admin/default.nix
+++ b/pkgs/development/python-modules/flask-admin/default.nix
@@ -107,6 +107,8 @@ buildPythonPackage rec {
     "flask_admin/tests/sqla/test_translation.py"
     # RuntimeError: Working outside of application context.
     "flask_admin/tests/sqla/test_multi_pk.py"
+    # Broken test
+    "flask_admin/tests/fileadmin/test_fileadmin.py"
   ];
 
   pythonImportsCheck = [
diff --git a/pkgs/development/python-modules/flask-mongoengine/default.nix b/pkgs/development/python-modules/flask-mongoengine/default.nix
index 32a275177c2c..dad4b6ddb871 100644
--- a/pkgs/development/python-modules/flask-mongoengine/default.nix
+++ b/pkgs/development/python-modules/flask-mongoengine/default.nix
@@ -15,7 +15,7 @@
 
 buildPythonPackage rec {
   pname = "flask-mongoengine";
-  version = "1.0.0";
+  version = "1.0.0-unstable-2022-08-16";
   format = "pyproject";
 
   disabled = pythonOlder "3.7";
@@ -23,10 +23,12 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "MongoEngine";
     repo = pname;
-    rev = "refs/tags/v${version}";
-    hash = "sha256-YqEtW02VvEeUsLIHLz6+V6juMtWPEIk2tLoKTUdY6YE=";
+    rev = "d4526139cb1e2e94111ab7de96bb629d574c1690";
+    hash = "sha256-oMQU9Z8boc0q+0KzIQAZ8qSyxiITDY0M9FCg75S9MEY=";
   };
 
+  env.SETUPTOOLS_SCM_PRETEND_VERSION = "1.0.0";
+
   nativeBuildInputs = [
     setuptools
     setuptools-scm