final: prev: prev.valgrind.overrideAttrs (old: {
  src = prev.fetchFromGitHub {
    owner = "petrpavlu";
    repo = "valgrind-riscv64";
    rev = "71272b252977fe52f03ea4fa8306b457b098cca5";
    hash = "sha256-xD84dYSzq9eD35NfnmtI/zONVRjhDAEJkge26yFK034=";
  };
  outputs = [ "out" ];
  patches = [
    (prev.fetchpatch {
      url = "https://bugsfiles.kde.org/attachment.cgi?id=149173";
      sha256 = "sha256-jX9hD4utWRebbXMJYZ5mu9jecvdrNP05E5J+PnKRTyQ=";
    })
  ];
})