clipboard-jh: fixed broken system clipboard integration

fixes https://github.com/NixOS/nixpkgs/issues/229659 as well as https://github.com/Slackadays/Clipboard/discussions/117

pkgs/tools/misc/clipboard-jh/default.nix

@@ -4,6 +4,7 @@
 , cmake
 , libffi
 , pkg-config
+, patchelf
 , wayland-protocols
 , wayland
 , xorg
@@ -45,6 +46,10 @@ stdenv.mkDerivation rec {
     "-DINSTALL_PREFIX=${placeholder "out"}"
   ];
 
+  postFixup = lib.optionalString stdenv.isLinux ''
+    patchelf $out/bin/cb --add-rpath $out/lib
+  '';
+
   meta = with lib; {
     description = "Cut, copy, and paste anything, anywhere, all from the terminal";
     homepage = "https://github.com/Slackadays/clipboard";