{
  pkgs,
  myCommitId,
  myDirtyFingerprint,
  ...
}:
let
  # NOTE (build-time-versioning task 2.2, remediation round): build-time is
  # no longer threaded through here -- it's computed inside each
  # derivation's own build phase (xce.nix/xcecli.nix `preConfigure`), since
  # builtins.currentTime is unavailable under flake pure-eval. Only
  # myCommitId (a genuine eval-time/flake-level value) still needs to be
  # passed down.
  # dirty-content-fingerprint task 2.2: myDirtyFingerprint is forwarded the
  # same way myCommitId already is -- a second, independent eval-time value,
  # not a build-phase one.
  xcecore = pkgs.callPackage ./xce.nix {
    inherit pkgs myCommitId myDirtyFingerprint;
    withDebug = false;
    withAsan = false;
  };
  xcecore_debug = pkgs.callPackage ./xce.nix {
    inherit pkgs myCommitId myDirtyFingerprint;
    withDebug = true;
    withAsan = true;
  };
  xcecli = pkgs.callPackage ./xcecli.nix {
    inherit pkgs myCommitId myDirtyFingerprint;
  };
in
{
  xcecore = xcecore;
  xcecore_debug = xcecore_debug;
  xcecli = xcecli;
}