libclthreads: refactor fix include directories fix symlink to library

pkgs/development/libraries/libclthreads/default.nix

···
-{ stdenv, fetchurl, }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "libclthreads-${version}";
   version = "2.4.0";
+
   src = fetchurl {
     url = "http://kokkinizita.linuxaudio.org/linuxaudio/downloads/clthreads-${version}.tar.bz2";
     sha256 = "1s8xx99z6llv46cvkllmd72v2pkzbfl5gngcql85mf14mxkdb7x6";
   };
 
-  configurePhase = ''
-    sed -e "s@/usr/local@$out@" -i Makefile
-    sed -e "s@/usr/bin/install@install@" -i Makefile
-    sed -e "s@/sbin/ldconfig@ldconfig@" -i Makefile
-    sed -e "s@SUFFIX :=.*@SUFFIX =@" -i Makefile
+  patchPhase = ''
+    # Fix hardcoded paths to executables
+    sed -e "s@/usr/bin/install@install@" -i ./Makefile
+    sed -e "s@/sbin/ldconfig@ldconfig@" -i ./Makefile
+
+    # Remove useless symlink: /lib64 -> /lib
+    sed -e '/ln -sf \$(CLTHREADS_MIN) \$(PREFIX)\/\$(LIBDIR)\/\$(CLTHREADS_SO)/d' -i ./Makefile
   '';
 
-  meta = {
-    description = "zita thread library";
-    version = "${version}";
-    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html";
-    license = stdenv.lib.licenses.lgpl21;
-    maintainers = [ stdenv.lib.maintainers.magnetophon ];
-    platforms = stdenv.lib.platforms.linux;
+  makeFlags = [
+    "PREFIX=$(out)"
+    "SUFFIX=''"
+  ];
+
+  preInstall = ''
+    # The Makefile does not create the include directory
+    mkdir -p $out/include
+  '';
+
+  postInstall = ''
+    ln -s $out/lib/libclthreads.so.${version} $out/lib/libclthreads.so
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Zita thread library";
+    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html;
+    license = licenses.lgpl21;
+    maintainers = with maintainers; [ magnetophon ];
+    platforms = platforms.linux;
   };
 }