{ firefoxPackages, clangStdenv }:

with firefoxPackages;

firefoxPackages // {
  # Use clangStdenv to work around
  # <https://github.com/NixOS/nixpkgs/issues/84283>
  # (Firefox fails to build with GCC on AMD EPYC 7401P.)

  firefox = (firefox.override {
    stdenv = clangStdenv;
  }).overrideAttrs ({ patches ? [], ... }: {
    patches = patches ++ [ release/D6695.diff ];
  });

  firefox-esr-78 = (firefox-esr-78.override {
    stdenv = clangStdenv;
  }).overrideAttrs ({ patches ? [], ... }: {
    patches = patches ++ [ esr/D6695.diff ];
  });

  firefox-beta = (firefox-beta.override {
    stdenv = clangStdenv;
  }).overrideAttrs ({ patches ? [], ... }: {
    patches = patches ++ [ beta/D6695.diff ];
  });

  firefox-nightly = (firefox-nightly.override {
    stdenv = clangStdenv;
  }).overrideAttrs ({ patches ? [], ... }: {
    patches = patches ++ [ nightly/D6695.diff ];
  });
}