bug#39809: emacs-edbi build fails

[Maxim Cournoyer]

Extract from build log:

starting phase `patch-path'
Backtrace:
           7 (primitive-load "/gnu/store/h6ni14a4sjmlncg6537xfklnhy0…")
In ice-9/eval.scm:
   191:35  6 (_ #f)
In ice-9/boot-9.scm:
    829:9  5 (catch srfi-34 #<procedure 7fffeed55d60 at /gnu/store/…> …)
In srfi/srfi-1.scm:
   863:16  4 (every1 #<procedure 7fffeed55d20 at /gnu/store/w851knb…> …)
In 
/gnu/store/w851knbmn8kxngmh9s43z9rnannsni7k-module-import/guix/build/gnu-build-system.scm:
   839:30  3 (_ _)
In ice-9/eval.scm:
    619:8  2 (_ #(#(#(#<directory (guile-user) 7fffefc63140>) # #) …))
In 
/gnu/store/w851knbmn8kxngmh9s43z9rnannsni7k-module-import/guix/build/utils.scm:
   733:19  1 (with-atomic-file-replacement "/gnu/store/0q9wy5rxx4kr…" …)
In unknown file:
           0 (mkstemp! "/gnu/store/0q9wy5rxx4kr130ixsl1l9b2wqnzqf38…" …)

ERROR: In procedure mkstemp!:
In procedure mkstemp!: No such file or directory