pkgs.makeStaticBinaries

The following is the current implementation of this function.

makeStaticBinaries = stdenv0:
    stdenv0.override (old: {
      mkDerivationFromStdenv = withOldMkDerivation old (stdenv: mkDerivationSuper: args:
      if stdenv.hostPlatform.isDarwin
      then throw "Cannot build fully static binaries on Darwin/macOS"
      else (mkDerivationSuper args).overrideAttrs (args: if args ? env.NIX_CFLAGS_LINK then {
        env = args.env // {
          NIX_CFLAGS_LINK = toString args.env.NIX_CFLAGS_LINK + " -static";
        };
      } else {
        NIX_CFLAGS_LINK = toString (args.NIX_CFLAGS_LINK or "") + " -static";
      } // lib.optionalAttrs (!(args.dontAddStaticConfigureFlags or false)) {
        configureFlags = (args.configureFlags or []) ++ [
          "--disable-shared" # brrr...
        ];
        cmakeFlags = (args.cmakeFlags or []) ++ ["-DCMAKE_SKIP_INSTALL_RPATH=On"];
      }));
    } // lib.optionalAttrs (stdenv0.hostPlatform.libc == "glibc") {
      extraBuildInputs = (old.extraBuildInputs or []) ++ [
        pkgs.glibc.static
      ];
    });