duktape: use upstream pkg-config file

pkgs/by-name/du/duktape/duktape.pc.in

@@ -1,10 +0,0 @@
-prefix=@out@
-exec_prefix=${prefix}
-libdir=${exec_prefix}/lib
-includedir=${prefix}/include
-
-Name: duktape
-Description: An embeddable Javascript engine, with a focus on portability and compact footprint
-Version: @version@
-Libs: -L${libdir} -lduktape
-Cflags: -I${includedir}

pkgs/by-name/du/duktape/package.nix

@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
       make -f Makefile.cmdline
     ''
     + lib.optionalString (!stdenv.hostPlatform.isStatic) ''
-      make -f Makefile.sharedlibrary
+      make INSTALL_PREFIX="$out" -f Makefile.sharedlibrary
     '';
 
   installPhase =
@@ -37,8 +37,8 @@ stdenv.mkDerivation (finalAttrs: {
     + lib.optionalString (!stdenv.hostPlatform.isStatic) ''
       install -d $out/lib/pkgconfig
       install -d $out/include
-      make -f Makefile.sharedlibrary install INSTALL_PREFIX=$out
+
-      substituteAll ${./duktape.pc.in} $out/lib/pkgconfig/duktape.pc
+      make INSTALL_PREFIX="$out" -f Makefile.sharedlibrary install
     '';
 
   enableParallelBuilding = true;