guix clean install hello fails

Backtrace:
In ice-9/threads.scm:
    390:8 19 (_ _)
In ice-9/boot-9.scm:
  3223:13 18 (_)
In ice-9/threads.scm:
    390:8 17 (_ _)
In ice-9/boot-9.scm:
  3507:20 16 (_)
   2806:4 15 (save-module-excursion _)
  3527:26 14 (_)
In unknown file:
          13 (primitive-load-path "guix/channels" #<procedure 3c9930…>)
In guix/channels.scm:
     21:0 12 (_)
In ice-9/boot-9.scm:
   3380:4 11 (define-module* _ #:filename _ #:pure _ #:version _ # _ …)
  3393:24 10 (_)
   222:17  9 (map1 (((git)) ((guix git)) ((guix records)) ((# #)) # …))
  3297:17  8 (resolve-interface (git) #:select _ #:hide _ #:prefix _ …)
In ice-9/threads.scm:
    390:8  7 (_ _)
In ice-9/boot-9.scm:
  3223:13  6 (_)
In ice-9/threads.scm:
    390:8  5 (_ _)
In ice-9/boot-9.scm:
  3507:20  4 (_)
   2806:4  3 (save-module-excursion _)
  3527:26  2 (_)
In unknown file:
           1 (primitive-load-path "git" #<procedure 3c97f0 at ice-9/…>)
In git/bindings.scm:
     66:8  0 (_ . _)

git/bindings.scm:66:8: In procedure git_libgit2_init: Function not implemented