Merge pull request #268786 from figsoda/symbolicator

symbolicator: fix build on darwin

pkgs/by-name/sy/symbolicator/package.nix

···
     SYMBOLICATOR_GIT_VERSION = src.rev;
     SYMBOLICATOR_RELEASE = version;
     ZSTD_SYS_USE_PKG_CONFIG = true;
+  } // lib.optionalAttrs stdenv.cc.isClang {
+    # Work around https://github.com/NixOS/nixpkgs/issues/166205.
+    NIX_LDFLAGS = "-l${stdenv.cc.libcxx.cxxabi.libName}";
   };
 
   # tests require network access