diff --git a/pkgs/development/libraries/partio/default.nix b/pkgs/development/libraries/partio/default.nix
index a567612fae4f..05c8abfafb2a 100644
--- a/pkgs/development/libraries/partio/default.nix
+++ b/pkgs/development/libraries/partio/default.nix
@@ -31,6 +31,7 @@ stdenv.mkDerivation rec {
     unzip
     cmake
     doxygen
+    python3
   ];
 
   buildInputs = [
@@ -38,7 +39,6 @@ stdenv.mkDerivation rec {
     swig
     xorg.libXi
     xorg.libXmu
-    python3
   ] ++ lib.optionals stdenv.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.GLUT