diff --git a/pkgs/applications/version-management/guitone/default.nix b/pkgs/applications/version-management/guitone/default.nix
index 8731cbfde19..8f8750b98c2 100644
--- a/pkgs/applications/version-management/guitone/default.nix
+++ b/pkgs/applications/version-management/guitone/default.nix
@@ -18,6 +18,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ qt4 qmake4Hook pkgconfig graphviz ];
 
+  qmakeFlags = [ "guitone.pro" ];
+
   meta = {
     description = "Qt4 based GUI for monotone";
     homepage = http://guitone.thomaskeller.biz;