building path(s) `/gnu/store/8s1yi6pa19b468kxwk8p2fz4sdr1xkd6-guix-latest'
copying and compiling to '/gnu/store/8s1yi6pa19b468kxwk8p2fz4sdr1xkd6-guix-latest'...
Backtrace:
In ice-9/boot-9.scm:
 157: 16 [catch #t #<catch-closure 8c9c60> ...]
In unknown file:
   ?: 15 [apply-smob/1 #<catch-closure 8c9c60>]
In ice-9/boot-9.scm:
  63: 14 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 13 [eval # #]
In ice-9/boot-9.scm:
2401: 12 [save-module-excursion #<procedure 8e6800 at ice-9/boot-9.scm:4045:3 ()>]
4050: 11 [#<procedure 8e6800 at ice-9/boot-9.scm:4045:3 ()>]
1724: 10 [%start-stack load-stack #<procedure 8f9ca0 at ice-9/boot-9.scm:4041:10 ()>]
1729: 9 [#<procedure 8fb9c0 ()>]
In unknown file:
   ?: 8 [primitive-load "/gnu/store/dkl5b716bnci8j5dhrwklb5vghd0fnya-guix-latest-builder"]
In ./guix/build/pull.scm:
  47: 7 [build-guix "/gnu/store/8s1yi6pa19b468kxwk8p2fz4sdr1xkd6-guix-latest" ...]
  51: 6 [#<procedure db8e40 at ./guix/build/pull.scm:47:2 ()>]
In ice-9/ftw.scm:
 451: 5 [loop "guix" "" ...]
In srfi/srfi-1.scm:
 465: 4 [fold #<procedure dfa1e0 at ice-9/ftw.scm:452:38 (subdir result+visited)> ...]
In ice-9/ftw.scm:
 453: 3 [#<procedure dfa1e0 at ice-9/ftw.scm:452:38 (subdir result+visited)> # #]
 482: 2 [loop "build-system" "guix" ...]
In ./guix/build/utils.scm:
 264: 1 [#<procedure db8600 at ./guix/build/utils.scm:255:20 (file stat result)> "guix/build-system/python.scm" ...]
In unknown file:
   ?: 0 [copy-file "guix/build-system/python.scm" ...]