neovim: fix build on Darwin

libluv path passed to -DLIBLUV_LIBRARY broken by change in libluv, eg:
libluv.dylib -> libluv.1.30.0.dylib

Signed-off-by: Sirio Balmelli <sirio@b-ad.ch>

pkgs/applications/editors/neovim/default.nix

@@ -20,6 +20,14 @@ let
     ));
 
   pyEnv = python.withPackages(ps: [ ps.pynvim ps.msgpack ]);
+
+  # FIXME: this is verry messy and strange.
+  # see https://github.com/NixOS/nixpkgs/pull/80528
+  luv = lua.pkgs.luv;
+  luvpath = with builtins ; if stdenv.isDarwin
+    then "${luv.libluv}/lib/lua/${lua.luaversion}/libluv.${head (match "([0-9.]+).*" luv.version)}.dylib"
+    else "${luv}/lib/lua/${lua.luaversion}/luv.so";
+
 in
   stdenv.mkDerivation rec {
     pname = "neovim-unwrapped";
@@ -47,7 +55,7 @@ in
       libtermkey
       libuv
       libvterm-neovim
-      lua.pkgs.luv.libluv
+      luv.libluv
       msgpack
       ncurses
       neovimLuaEnv
@@ -88,10 +96,8 @@ in
     cmakeFlags = [
       "-DGPERF_PRG=${gperf}/bin/gperf"
       "-DLUA_PRG=${neovimLuaEnv.interpreter}"
+      "-DLIBLUV_LIBRARY=${luvpath}"
     ]
-    # FIXME: this is verry messy and strange.
-    ++ optional (!stdenv.isDarwin) "-DLIBLUV_LIBRARY=${lua.pkgs.luv}/lib/lua/${lua.luaversion}/luv.so"
-    ++ optional (stdenv.isDarwin) "-DLIBLUV_LIBRARY=${lua.pkgs.luv.libluv}/lib/lua/${lua.luaversion}/libluv.dylib"
     ++ optional doCheck "-DBUSTED_PRG=${neovimLuaEnv}/bin/busted"
     ++ optional (!lua.pkgs.isLuaJIT) "-DPREFER_LUA=ON"
     ;