alacritty: add cf-private on darwin

note: Undefined symbols for architecture x86_64:
            "_CFURLResourceIsReachable", referenced from:
                alacritty::config::Monitor:🆕:_$u7b$$u7b$closure$u7d$$u7d$::h8c82fbfba8a3a673 in alacritty-6a8d3226ed5c4bef.alacritty.9tpyu7jw-cgu.1.rcgu.o
            "_NSDefaultRunLoopMode", referenced from:
                alacritty::main::hd6e46019b2208595 in alacritty-6a8d3226ed5c4bef.alacritty.9tpyu7jw-cgu.1.rcgu.o
          ld: symbol(s) not found for architecture x86_64
          clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)

pkgs/applications/misc/alacritty/default.nix

@@ -18,6 +18,7 @@
   libGL,
   xclip,
   # Darwin Frameworks
+  cf-private,
   AppKit,
   CoreFoundation,
   CoreGraphics,
@@ -40,15 +41,6 @@ let
     libGL
     libXi
   ];
-  darwinFrameworks = [
-    AppKit
-    CoreFoundation
-    CoreGraphics
-    CoreServices
-    CoreText
-    Foundation
-    OpenGL
-  ];
 in buildRustPackage rec {
   name = "alacritty-unstable-${version}";
   version = "0.2.1";
@@ -71,7 +63,11 @@ in buildRustPackage rec {
   ];
 
   buildInputs = rpathLibs
-             ++ lib.optionals stdenv.isDarwin darwinFrameworks;
+    ++ lib.optionals stdenv.isDarwin [
+      AppKit CoreFoundation CoreGraphics CoreServices CoreText Foundation OpenGL
+      # Needed for CFURLResourceIsReachable symbols.
+      cf-private
+    ];
 
   outputs = [ "out" "terminfo" ];
 

pkgs/top-level/all-packages.nix

@@ -519,6 +519,7 @@ with pkgs;
 
   alacritty = callPackage ../applications/misc/alacritty {
     inherit (xorg) libXcursor libXxf86vm libXi;
+    inherit (darwin) cf-private;
     inherit (darwin.apple_sdk.frameworks) AppKit CoreFoundation CoreGraphics CoreServices CoreText Foundation OpenGL;
   };