diff --git a/pkgs/applications/science/misc/boinc/default.nix b/pkgs/applications/science/misc/boinc/default.nix
index 53ea9ce72125..54be212b86cd 100644
--- a/pkgs/applications/science/misc/boinc/default.nix
+++ b/pkgs/applications/science/misc/boinc/default.nix
@@ -18,10 +18,6 @@ stdenv.mkDerivation rec {
     libxcb xcbutil
   ];
 
-  postConfigure = ''
-    sed -i -e s,/etc,$out/etc, client/scripts/Makefile
-  '';
-
   NIX_LDFLAGS = "-lX11";
 
   preConfigure = ''