diff --git a/pkgs/development/libraries/bobcat/default.nix b/pkgs/development/libraries/bobcat/default.nix
index e0be473b1763..f6f96c816b2b 100644
--- a/pkgs/development/libraries/bobcat/default.nix
+++ b/pkgs/development/libraries/bobcat/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     substituteInPlace INSTALL.im --replace /usr $out
-    patchShebangs ./build
+    patchShebangs .
   '';
 
   buildPhase = ''