starting download of `/tmp/guix-file.ZzVKjr' from `http://git.savannah.gnu.org/cgit/guix.git/snapshot/guix-master.tar.gz'...
http://git.savannah.gnu.org/.../guix-master.tar.gz	6613.0 KiB transferred
The following derivation will be built:
   /gnu/store/4wncgpiq1jh1snq2ikm5q0iy7ycng2m8-guix-latest.drv
building path(s) `/gnu/store/h3f4805v26d1f89jrvw0c5rhm7d77ba5-guix-latest'
copying and compiling to '/gnu/store/h3f4805v26d1f89jrvw0c5rhm7d77ba5-guix-latest'...
compiling...	  9.9% of 335 filesERROR: no code for module (json)
Backtrace:
In ice-9/boot-9.scm:
 157: 11 [catch #t #<catch-closure 212c920> ...]
In unknown file:
   ?: 10 [apply-smob/1 #<catch-closure 212c920>]
In ice-9/boot-9.scm:
  63: 9 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 8 [eval # #]
In ice-9/boot-9.scm:
2401: 7 [save-module-excursion #<procedure 2149800 at ice-9/boot-9.scm:4045:3 ()>]
4050: 6 [#<procedure 2149800 at ice-9/boot-9.scm:4045:3 ()>]
1724: 5 [%start-stack load-stack ...]
1729: 4 [#<procedure 215e9c0 ()>]
In unknown file:
   ?: 3 [primitive-load "/gnu/store/i0wpgjn04gvj4bc91ch558wv54rslw86-guix-latest-builder"]
In /gnu/store/d4vmrl5kvprwbblrg5m44sf4az5lbha3-module-import/guix/build/pull.scm:
 151: 2 [build-guix "/gnu/store/h3f4805v26d1f89jrvw0c5rhm7d77ba5-guix-latest" ...]
  97: 1 [loop # 4 33]
In unknown file:
   ?: 0 [scm-error misc-error #f ...]

ERROR: In procedure scm-error:
ERROR: process failed #<procedure 250bce0 at /gnu/store/d4vmrl5kvprwbblrg5m44sf4az5lbha3-module-import/guix/build/pull.scm:151:14 (file)> 256
builder for `/gnu/store/4wncgpiq1jh1snq2ikm5q0iy7ycng2m8-guix-latest.drv' failed with exit code 1
killing process 17496
guix pull: error: build failed: build of `/gnu/store/4wncgpiq1jh1snq2ikm5q0iy7ycng2m8-guix-latest.drv' failed
408 operations