fix(nix): work around CMake bug causing missing libstdc++.so.6

quick-lint-js fails to run after installation:

    $ quick-lint-js --version
    quick-lint-js: error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory

Cause: NixOS/nixpkgs#108496 (comment)

Work around this error.

This workaround has landed in Nixpkgs upstream:
NixOS/nixpkgs#190091

.github/workflows/test-nix-install.yml

@@ -24,9 +24,8 @@ jobs:
       - name: install
         run: nix-env -f . -i
 
-      # TODO(#792): Re-enable when Nixpkgs fixes things.
-      #- name: test executable
-      #  run: cd / && quick-lint-js --help
+      - name: test executable
+        run: cd / && quick-lint-js --help
 
 # quick-lint-js finds bugs in JavaScript programs.
 # Copyright (C) 2020  Matthew Glazar

dist/nix/quick-lint-js.nix

@@ -23,6 +23,9 @@ mkDerivation {
   doCheck = doCheck;
   dontFixCmake = dontFixCmake;
 
+  # Temporary workaround for https://github.com/NixOS/nixpkgs/pull/108496#issuecomment-1192083379
+  cmakeFlags = [ "-DCMAKE_SKIP_BUILD_RPATH=ON" ];
+
   meta = with lib; {
     description = "quick-lint-js finds bugs in JavaScript programs";
     homepage = "https://github.com/strager/quick-lint-js";