all: embrace unit packages where possible

pkgs/development/libraries/libhl/default.nix

@@ -1,35 +0,0 @@
-{ stdenv
-, lib
-, fetchFromGitHub
-
-, autoreconfHook
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libhl";
-  version = "3.1";
-
-  src = fetchFromGitHub {
-    owner = "xant";
-    repo = pname;
-    rev = "${pname}-${version}";
-    sha256 = "05mrp5rmki0wghdpmcgvsi8lqhfshifbmhp1qlkd89fb2srq91lf";
-  };
-
-  nativeBuildInputs = [
-    autoreconfHook
-  ];
-
-  patches = [ ./fix-link.patch ];
-
-  preInstall = ''
-    mkdir -p $out/include $out/lib
-  '';
-
-  meta = with lib; {
-    homepage = "https://github.com/xant/libhl";
-    description = "Simple and fast C library implementing a thread-safe API to manage hash-tables, linked lists, lock-free ring buffers and queues ";
-    license = licenses.lgpl3;
-    platforms = platforms.all;
-  };
-}

pkgs/development/libraries/libhl/fix-link.patch

@@ -1,13 +0,0 @@
-diff --git a/Makefile.in b/Makefile.in
-index 97b3901..4191da6 100644
---- a/Makefile.in
-+++ b/Makefile.in
-@@ -69,7 +69,7 @@ static: objects
- 
- .PHONY: shared
- shared: objects
--	./libtool --mode=link $(CC) $(LIBS) $(LDFLAGS) -Wc,$(SHAREDFLAGS) -o $(builddir)/libhl.$(SHAREDEXT) $(builddir)/*.o
-+	./libtool --mode=link $(CC) $(LIBS) $(LDFLAGS) -Wc,$(SHAREDFLAGS) -o $(builddir)/libhl.$(SHAREDEXT) .libs/*.o
- 
- %.o : $(srcdir)/src/%.c
- 	./libtool --mode=compile $(CC) -c $(CFLAGS) $< -o $(builddir)/$@