diff --git a/pkgs/development/libraries/fpattern/default.nix b/pkgs/development/libraries/fpattern/default.nix
index b0ab2c3d2ce..e1b75f025c8 100644
--- a/pkgs/development/libraries/fpattern/default.nix
+++ b/pkgs/development/libraries/fpattern/default.nix
@@ -3,19 +3,18 @@
 stdenv.mkDerivation (finalAttrs: {
   version = "1.9";
   pname = "fpattern";
-  outputs = [ "out" "dev" ];
 
   src = fetchFromGitHub {
     owner = "Loadmaster";
-    repo = finalAttrs.pname;
+    repo = "fpattern";
     rev = "v${finalAttrs.version}";
     hash = "sha256-/QvMQCmoocaXfDm3/c3IAPyfZqR6d7IiJ9UoFKZTpVI=";
   };
 
   installPhase = ''
     runHook preInstall
-    mkdir -p $out $dev/include
-    cp *.c *.h $dev/include
+    mkdir -p $out/include
+    cp *.c *.h $out/include
     runHook postInstall
   '';