anchor.diff:                   ++ optional ((versionOlder version "1.57") || version == "1.58") "x86_64-darwin"
                    ++ optionals (versionOlder version "1.73") lib.platforms.riscv;
       maintainers = with maintainers; [ hjones2199 ];
  +
  +    broken =
  +      # boost-context lacks support for the N32 ABI on mips64.  The build
  +      # will succeed, but packages depending on boost-context will fail with
  +      # a very cryptic error message.
  +      stdenv.hostPlatform.isMips64n32 ||
  +      # the patch above does not apply cleanly to pre-1.65 boost
  +      (stdenv.hostPlatform.isMips64n64 && (versionOlder version "1.65"));
     };
   
     preConfigure = optionalString useMpi ''
  
positive.code:     # https://www.boost.org/doc/libs/1_66_0/libs/context/doc/html/context/architectures.html
      "abi=${if stdenv.hostPlatform.parsed.cpu.family == "arm" then "aapcs"
             else if stdenv.hostPlatform.isWindows then "ms"
             else if stdenv.hostPlatform.isMips then "o32"
             else "sysv"}"
    ] ++ optional (link != "static") "runtime-link=${runtime-link}"
      ++ optional (variant == "release") "debug-symbols=off"
  
negative.code:       sha256 = "15d2a636hhsb1xdyp44x25dyqfcaws997vnp9kl1mhzvxjzz7hb0";
        stripLen = 1;
      })
    ++ optional (versionAtLeast version "1.65" && versionOlder version "1.70") (fetchpatch {
      # support for Mips64n64 appeared in boost-context 1.70; this patch won't apply to pre-1.65 cleanly
      url = "https://github.com/boostorg/context/commit/e3f744a1862164062d579d1972272d67bdaa9c39.patch";
      sha256 = "sha256-qjQy1b4jDsIRrI+UYtcguhvChrMbGWO0UlEzEJHYzRI=";
      stripLen = 1;
      extraPrefix = "libs/context/";
    })
    ++ optional (and (versionAtLeast version "1.70") (!versionAtLeast version "1.73")) ./cmake-paths.patch
    ++ optional (versionAtLeast version "1.73") ./cmake-paths-173.patch
    ++ optional (version == "1.77.0") (fetchpatch {
  