diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 241942d2291..3698d3cf4dc 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -13033,9 +13033,9 @@ let
 
     buildInputs = with self; [ python pkgs.pkgconfig pkgs.libvirt lxml ];
 
-    buildPhase = "python setup.py build";
+    buildPhase = "${python.interpreter} setup.py build";
 
-    installPhase = "python setup.py install --prefix=$out";
+    installPhase = "${python.interpreter} setup.py install --prefix=$out";
 
     meta = {
       homepage = http://www.libvirt.org/;