diff --git a/pkgs/development/python-modules/tkinter-gl/default.nix b/pkgs/development/python-modules/tkinter-gl/default.nix
index 14bc74925810..8a4787f025fb 100644
--- a/pkgs/development/python-modules/tkinter-gl/default.nix
+++ b/pkgs/development/python-modules/tkinter-gl/default.nix
@@ -12,14 +12,14 @@
 
 buildPythonPackage rec {
   pname = "tkinter-gl";
-  version = "1.0";
+  version = "1.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "3-manifolds";
     repo = "tkinter_gl";
     tag = "v${version}_as_released";
-    hash = "sha256-ObI8EEQ7mAOAuV6f+Ld4HH0xkFzqiAZqHDvzjwPA/wM";
+    hash = "sha256-PNxxjyVGoMw4J/SXWvVITuGMq/HypxUwDkSxeFy2Vag=";
   };
 
   postPatch = ''
@@ -27,7 +27,7 @@ buildPythonPackage rec {
     rm -r src/tkinter_gl/tk
     # Platform-specific directories are only necessary when using compiled TkGL
     substituteInPlace src/tkinter_gl/__init__.py \
-      --replace-fail "pkg_dir = os.path.join(__path__[0], 'tk', sys.platform,)" \
+      --replace-fail "pkg_dir = os.path.join(__path__[0], 'tk', target)" \
                      "pkg_dir = os.path.join(__path__[0], 'tk')"
   '';