Merge pull request #268190 from reckenrode/difftastic-clang16

difftastic: fix build with clang 12+

pkgs/tools/text/difftastic/default.nix

@@ -4,6 +4,7 @@
 , fetchFromGitHub
 , testers
 , difftastic
+, stdenv
 }:
 
 let
@@ -32,6 +33,11 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
+  # Work around https://github.com/NixOS/nixpkgs/issues/166205.
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    NIX_LDFLAGS = "-l${stdenv.cc.libcxx.cxxabi.libName}";
+  };
+
   postPatch = ''
     patch -d $cargoDepsCopy/libmimalloc-sys-0.1.24/c_src/mimalloc \
       -p1 < ${mimallocPatch}