Just checking this, looks like 1.8.3 is still not reproducible, just one
file differs though:

→ guix challenge --diff=simple julia
/gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3 contents differ:
  no local build for '/gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3'
  https://ci.guix.gnu.org/nar/lzip/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3: 0jzli7ym7ihj7zhqwqp8lgwn6c38n44ld1rdn39pa7n8qp1q154r
  https://bordeaux.guix.gnu.org/nar/lzip/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3: 0616kaa8pbhzrkvcnj191yw1pcd4gy73rvmcr2cv6j7pfxyrzj7y
  differing file:
    /lib/julia/sys.so