bug#53264: webkitgtk 2.34.3 is not reproducible

[Ludovic Courtès]

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$ guix challenge webkitgtk
/gnu/store/8spscikdbn2dbfm19rladnrlvl4b5lh0-webkitgtk-2.34.3 contents differ:
  no local build for 
'/gnu/store/8spscikdbn2dbfm19rladnrlvl4b5lh0-webkitgtk-2.34.3'
  
https://ci.guix.gnu.org/nar/lzip/8spscikdbn2dbfm19rladnrlvl4b5lh0-webkitgtk-2.34.3:
 15p35jkp9ljxqzhsba033zdv609n58ziwpxs771j44xm99cfirsr
  
https://bordeaux.guix.gnu.org/nar/lzip/8spscikdbn2dbfm19rladnrlvl4b5lh0-webkitgtk-2.34.3:
 18m32m2qyaj9zb5ywpn88lpi614k1011s6ccr3wv7bb85w0m5z1f
  differing file:
    /lib/libwebkit2gtk-4.1.so.0.0.3

1 store items were analyzed:
  - 0 (0.0%) were identical
  - 1 (100.0%) differed
  - 0 (0.0%) were inconclusive
$ guix describe
Generacio 201   Jan 12 2022 23:15:13    (nuna)
  guix 0052c3b
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 0052c3b0458fba32920a1cfb48b8311429f0d6b5
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