diff --git a/pkgs/development/python-modules/icnsutil/default.nix b/pkgs/development/python-modules/icnsutil/default.nix
index 641da36626d6..fd6976374581 100644
--- a/pkgs/development/python-modules/icnsutil/default.nix
+++ b/pkgs/development/python-modules/icnsutil/default.nix
@@ -17,8 +17,8 @@ python3Packages.buildPythonPackage rec {
   doCheck = true;
 
   checkPhase = ''
-    ${python3Packages.python}/bin/python3 tests/test_icnsutil.py
-    ${python3Packages.python}/bin/python3 tests/test_cli.py
+    ${python3.interpreter} tests/test_icnsutil.py
+    ${python3.interpreter} tests/test_cli.py
   '';
 
   meta = {