diff --git a/pkgs/applications/science/misc/cwltool/default.nix b/pkgs/applications/science/misc/cwltool/default.nix
index 8da98e131f64f..ab43eac8bffb0 100644
--- a/pkgs/applications/science/misc/cwltool/default.nix
+++ b/pkgs/applications/science/misc/cwltool/default.nix
@@ -24,8 +24,7 @@ python3.pkgs.buildPythonApplication rec {
       --replace '"schema-salad >= 8.4.20230426093816, < 9",' "" \
       --replace "PYTEST_RUNNER + " ""
     substituteInPlace pyproject.toml \
-      --replace "ruamel.yaml>=0.16.0,<0.18" "ruamel.yaml" \
-      --replace "mypy==1.10.0" "mypy==1.10.*"
+      --replace "ruamel.yaml>=0.16.0,<0.18" "ruamel.yaml"
   '';
 
   nativeBuildInputs = [
diff --git a/pkgs/development/python-modules/mypy/default.nix b/pkgs/development/python-modules/mypy/default.nix
index 0f264d2c86a1c..ffdd8bc5ac2c2 100644
--- a/pkgs/development/python-modules/mypy/default.nix
+++ b/pkgs/development/python-modules/mypy/default.nix
@@ -3,7 +3,6 @@
   stdenv,
   buildPythonPackage,
   fetchFromGitHub,
-  gitUpdater,
   pythonAtLeast,
   pythonOlder,
 
@@ -32,7 +31,7 @@
 
 buildPythonPackage rec {
   pname = "mypy";
-  version = "1.10.1";
+  version = "1.10.0";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -41,10 +40,7 @@ buildPythonPackage rec {
     owner = "python";
     repo = "mypy";
     rev = "refs/tags/v${version}";
-    hash = "sha256-joV+elRaAICNQHkYuYtTDjvOUkHPsRkG1OLRvdxeIHc=";
-  };
-  passthru.updateScript = gitUpdater {
-    rev-prefix = "v";
+    hash = "sha256-NCnc4C/YFKHN/kT7RTFCYs/yC00Kt1E7mWCoQuUjxG8=";
   };
 
   build-system = [
diff --git a/pkgs/development/python-modules/schema-salad/default.nix b/pkgs/development/python-modules/schema-salad/default.nix
index 6e3b6e3d5ed62..4df6f0af21f08 100644
--- a/pkgs/development/python-modules/schema-salad/default.nix
+++ b/pkgs/development/python-modules/schema-salad/default.nix
@@ -4,7 +4,6 @@
   buildPythonPackage,
   cachecontrol,
   fetchFromGitHub,
-  fetchpatch,
   importlib-resources,
   mistune,
   mypy,
@@ -57,11 +56,6 @@ buildPythonPackage rec {
     ++ cachecontrol.optional-dependencies.filecache
     ++ lib.optionals (pythonOlder "3.9") [ importlib-resources ];
 
-  patches = [ (fetchpatch {
-    url = "https://patch-diff.githubusercontent.com/raw/common-workflow-language/schema_salad/pull/840.patch";
-    hash = "sha256-fke75FCCn23LAMJ5bDWJpuBR6E9XIpjmzzXSbjqpxn8=";
-  } ) ];
-
   nativeCheckInputs = [ pytestCheckHook ] ++ passthru.optional-dependencies.pycodegen;
 
   preCheck = ''