Backtrace:
In ice-9/boot-9.scm:
  66: 19 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 18 [eval # #]
In unknown file:
   ?: 17 [call-with-input-string "(apply (module-ref (resolve-interface '(hydra-eval-guile-jobs)) 'eval-guile-jobs) (cdr (command-line)))" ...]
In ice-9/command-line.scm:
 181: 16 [#<procedure 1c7b4e0 at ice-9/command-line.scm:176:6 (port)> #<input: string 2534c30>]
In unknown file:
   ?: 15 [eval (apply (module-ref # #) (cdr #)) #<directory (guile-user) 1c55bd0>]
In /usr/local/bin/hydra-eval-guile-jobs:
 240: 14 [eval-guile-jobs "/gnu/store/wkzi7v7km642p9bxp2sl0fi5afplw6q1-git-export/build-aux/hydra/gnu-system.scm" ...]
In ice-9/eval.scm:
 481: 13 [lp (#<fluid 38>) (#f)]
In srfi/srfi-1.scm:
 643: 12 [append-map #<procedure 2f9a630 at ice-9/eval.scm:416:20 (a)> #]
 575: 11 [map #<procedure 2f9a630 at ice-9/eval.scm:416:20 (a)> #]
In ice-9/eval.scm:
 387: 10 [eval # #]
 387: 9 [eval # #]
 387: 8 [eval # #]
In guix/store.scm:
1437: 7 [run-with-store # #<procedure d629f00 at ice-9/eval.scm:416:20 (a)> # ...]
In gnu/system/vm.scm:
 319: 6 [#<procedure 1452f840 at gnu/system/vm.scm:319:4 (state)> #]
In gnu/services.scm:
 268: 5 [#<procedure 128cbcc0 at gnu/services.scm:268:2 (state)> #]
In guix/monads.scm:
 485: 4 [#<procedure 12067480 at guix/monads.scm:485:9 (state)> #]
In gnu/services.scm:
 536: 3 [#<procedure 1ccb4c80 at gnu/services.scm:536:2 (state)> #]
In guix/profiles.scm:
1223: 2 [#<procedure 10e5f210 at guix/profiles.scm:1223:2 (state)> #]
In guix/store.scm:
1343: 1 [#<procedure 10ea0e10 at guix/store.scm:1343:0 (state)> #]
In guix/profiles.scm:
 266: 0 [#<procedure 120a7b40 at guix/profiles.scm:257:16 (state)> #]

guix/profiles.scm:266:22: In procedure #<procedure 120a7b40 at guix/profiles.scm:257:16 (state)>:
guix/profiles.scm:266:22: Throw to key `srfi-34' with args `(#<condition &profile-collision-error [entry: #<<manifest-entry> name: "gmp" version: "6.1.2" output: "out" item: "/gnu/store/vwv9by5zkz92plp3ilrgf6jd2h5rkcr2-gmp-6.1.2" dependencies: () search-paths: () parent: #<promise #<procedure 1cca3880 at guix/profiles.scm:282:61 ()>>> conflict: #<<manifest-entry> name: "gmp" version: "6.1.2" output: "out" item: "/gnu/store/cls0lqyja4i3bqszip568iprlszm8qwh-gmp-6.1.2" dependencies: () search-paths: () parent: #<promise #<procedure 1ccad380 at guix/profiles.scm:282:61 ()>>>] 10ea0d20>)'.