diff --git a/pkgs/applications/networking/instant-messengers/salut-a-toi/default.nix b/pkgs/applications/networking/instant-messengers/salut-a-toi/default.nix
index d442addaeaa4..78814fcb4b22 100644
--- a/pkgs/applications/networking/instant-messengers/salut-a-toi/default.nix
+++ b/pkgs/applications/networking/instant-messengers/salut-a-toi/default.nix
@@ -26,7 +26,7 @@ in stdenv.mkDerivation rec {
   '';
 
   buildPhase = ''
-    ${python.interpreter}setup.py build
+    ${python.interpreter} setup.py build
   '';
 
   installPhase = ''