diff --git a/pkgs/servers/http/apache-modules/mod_fastcgi/default.nix b/pkgs/servers/http/apache-modules/mod_fastcgi/default.nix
index 40bd37ce40bf..eef935f73745 100644
--- a/pkgs/servers/http/apache-modules/mod_fastcgi/default.nix
+++ b/pkgs/servers/http/apache-modules/mod_fastcgi/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   preBuild = ''
     cp Makefile.AP2 Makefile
-    makeFlags="top_dir=${apacheHttpd}/share prefix=$out"
+    makeFlags="top_dir=${apacheHttpd.dev}/share prefix=$out"
   '';
 
   meta = {