diff --git a/pkgs/development/python-modules/collidoscope/default.nix b/pkgs/development/python-modules/collidoscope/default.nix
index 2ad63e83c081..b8c334bb6736 100644
--- a/pkgs/development/python-modules/collidoscope/default.nix
+++ b/pkgs/development/python-modules/collidoscope/default.nix
@@ -1,7 +1,8 @@
 {
   lib,
   buildPythonPackage,
-  fetchPypi,
+  fetchFromGitHub,
+  setuptools,
   babelfont,
   kurbopy,
   fonttools,
@@ -9,19 +10,26 @@
   tqdm,
   uharfbuzz,
   unittestCheckHook,
+  pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "collidoscope";
   version = "0.6.5";
-  format = "setuptools";
+  pyproject = true;
 
-  src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-D7MzJ8FZjA/NSXCqCJQ9a02FPPi3t4W0q65wRIDcfSA=";
+  src = fetchFromGitHub {
+    owner = "googlefonts";
+    repo = "collidoscope";
+    tag = "v${version}";
+    hash = "sha256-1tKbv+i2gbUFJa94xSEj5BrEpZ0+ULgglkYvGMP4NXw=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
     babelfont
     kurbopy
     fonttools
@@ -37,10 +45,12 @@ buildPythonPackage rec {
     "-v"
   ];
 
-  meta = with lib; {
+  __darwinAllowLocalNetworking = true;
+
+  meta = {
     description = "Python library to detect glyph collisions in fonts";
     homepage = "https://github.com/googlefonts/collidoscope";
-    license = licenses.mit;
-    maintainers = with maintainers; [ danc86 ];
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ danc86 ];
   };
 }