anchor.diff:  
   ;; Cutting a release:
   ;; Start from a clean checkout of mbuild
  +;; Ensure that Iota is present (or linked) and built in the home directory
   ;; Set *lisp-implementation-version* appropriately (system/environment.lisp)
   ;; Optional: Point ASDF source registry at (pathname "SYS:HOME;") (ipl.lisp, HOME-SOURCE-REGISTRY) instead of (user-homedir-pathname). This gets the source paths right for ED.
   ;; Build as normal
  
positive.code: (defun load-iota ()
    ;; Doom & Quake
    ;; It's assumed that prboom.lisp and sdlquake.lisp have already been built
    (let ((*default-pathname-defaults* (merge-pathnames "../Iota/"))
          (mezzano.compiler::*max-optimizer-iterations* 200))
      (let ((asdf:*central-registry* (list* *default-pathname-defaults* asdf:*central-registry*)))
        (asdf:load-system :iota))
      (defpackage :prboom
        (:use :cl :llvm-runtime)
        (:export #:make-context #:spawn))
  
negative.code:              *default-pathname-defaults*
               #p"LOCAL:>Mezzano>"
               :filter 'file-filter)
    ;; And everything else.
    (copy-many (merge-pathnames "*/**/*.*" (user-homedir-pathname))
               (user-homedir-pathname)
  