netexec: mark as broken in Darwin

pkgs/tools/security/netexec/default.nix

@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , fetchFromGitHub
 , python3
 }:
@@ -109,5 +110,9 @@ python.pkgs.buildPythonApplication rec {
     license = with licenses; [ bsd2 ];
     mainProgram = "nxc";
     maintainers = with maintainers; [ vncsb ];
+    # FIXME: failing fixupPhase:
+    # $ Rewriting #!/nix/store/<hash>-python3-3.11.7/bin/python3.11 to #!/nix/store/<hash>-python3-3.11.7
+    # $ /nix/store/<hash>-wrap-python-hook/nix-support/setup-hook: line 65: 47758 Killed: 9               sed -i "$f" -e "1 s^#!/nix/store/<hash>-python3-3.11.7^#!/nix/store/<hash>-python3-3.11.7^"
+    broken = stdenv.isDarwin;
   };
 }