(define-public emacs-checkout
  (let ((commit "f0eb70d8935be90f7c03e187c12d9b60e7214cc6")
	(revision "1"))
    (package
      (inherit emacs)
      (name "emacs")
      (version (string-append "26.0.50" "-" revision "."
			      (string-take commit 7)))
      (source
       (origin
	 (method git-fetch)
	 (uri (git-reference
	       ;; "git://git.savannah.gnu.org/emacs.git"
	       (url "git://localhost/~natsu/src/emacs")
	       (commit commit)))
	 (file-name (string-append name "-" version "-checkout"))
	 (patches (search-patches "emacs-exec-path.patch"
				  "emacs-source-date-epoch.patch"))
	 (modules '((guix build utils)))
	 (snippet
	  ;; Delete the bundled byte-compiled elisp files and
	  ;; generated autoloads.
	  '(with-directory-excursion "lisp"
	     (for-each delete-file
		       (append (find-files "." "\\.elc$")
			       (find-files "." "loaddefs\\.el$")))

	     ;; Make sure Tramp looks for binaries in the right places on
	     ;; remote GuixSD machines, where 'getconf PATH' returns
	     ;; something bogus.
	     (substitute* "net/tramp-sh.el"
	       ;; Patch the line after "(defcustom tramp-remote-path".
	       (("\\(tramp-default-remote-path")
		(format #f "(tramp-default-remote-path ~s ~s ~s ~s "
			"~/.guix-profile/bin" "~/.guix-profile/sbin"
			"/run/current-system/profile/bin"
			"/run/current-system/profile/sbin")))))
	 (sha256
	  (base32 "1s2b9qahcqgp085fadsjys3w60z9dczh0y0jhnsp0axwi27ssmzc"))))
      (native-inputs
       `(("autoconf" ,autoconf)
	 ("automake" ,automake)
	 ("bash" ,bash-minimal)
	 ("perl" ,perl)
	 ("rc" ,rc)
	 ("python" ,python-2.7)
	 ("chez-scheme" ,chez-scheme)
	 ,@(package-native-inputs emacs)))
      (arguments
       (substitute-keyword-arguments
	   `(#:parallel-build? #t
			       #:tests? #f
			       ,@(package-arguments emacs))
	 ((#:phases phases)
	  `(modify-phases ,phases
	     (add-after 'unpack 'autogen
	       (lambda _
		 (zero? (system* "sh" "autogen.sh"))))
	     (delete 'reset-gzip-timestamps))))))))

(define-public geiser-checkout
  (let ((commit "9581e61f9d8839281fe42344dd5fe885ea7359ea")
	(revision "1"))
    (package
      (inherit geiser)
      (name "geiser")
      (version (string-append "0.9" "-" revision "."
			      (string-take commit 7)))
      (source
       (origin
	 (method git-fetch)
	 (uri (git-reference
	       (url "git://git.savannah.gnu.org/geiser.git")
	       (commit commit)))
	 (file-name (string-append name "-" version "-checkout"))
	 (sha256
	  (base32 "0nx86pzncab0b7700m8sc7k3nzml4v9frrq77lljjcjhw71gnvnn"))))
      (native-inputs
       `(("autoconf" ,autoconf)
	 ("automake" ,automake)
	 ("texinfo" ,texinfo)
	 ,@(package-native-inputs geiser)))
      (arguments
       (substitute-keyword-arguments
	   `(#:parallel-build? #t
			       #:tests? #f
			       ,@(package-arguments geiser))
	 ((#:phases phases)
	  `(modify-phases ,phases
	     (add-after 'unpack 'autogen
	       (lambda _
		 (zero? (system* "sh" "autogen.sh"))))
	     (delete 'reset-gzip-timestamps))))))))

(define-public emacs-guix-checkout
  (package
    (inherit emacs-guix)
    (version (string-append (package-version emacs-guix) "-checkout"))
    (propagated-inputs
     `(("geiser" ,geiser-checkout)
       ("dash" ,emacs-dash)
       ("bui" ,emacs-bui)
       ("magit-popup" ,emacs-magit-popup)))))