nickel: fix build on darwin

pkgs/by-name/ni/nickel/package.nix

@@ -1,6 +1,7 @@
 { lib
 , rustPlatform
 , fetchFromGitHub
+, stdenv
 , python3
 , nix-update-script
 }:
@@ -36,6 +37,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoBuildFlags = [ "-p nickel-lang-cli" "-p nickel-lang-lsp" ];
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    # Work around https://github.com/NixOS/nixpkgs/issues/166205.
+    NIX_LDFLAGS = "-l${stdenv.cc.libcxx.cxxabi.libName}";
+  };
+
   nativeBuildInputs = [
     python3
   ];