guix pull doesn't work

[Bost]

Hi, could you please fix it?

The error message is:

building /gnu/store/y2ggg8678fw69wrz3jvq5hy185i3n5kn-giuliano108-guix-packages.drv...
\builder for `/gnu/store/y2ggg8678fw69wrz3jvq5hy185i3n5kn-giuliano108-guix-packages.drv' failed to produce output path `/gnu/store/bz4lqnsi4vsyb0pc6v0v16l826bx5vn0-giuliano108-guix-packages'
build of /gnu/store/y2ggg8678fw69wrz3jvq5hy185i3n5kn-giuliano108-guix-packages.drv failed
View build log at '/var/log/guix/drvs/y2/ggg8678fw69wrz3jvq5hy185i3n5kn-giuliano108-guix-packages.drv.bz2'.
cannot build derivation `/gnu/store/0jy3im4i9lkcjj2rqp48z9skb7w6wm66-profile.drv': 1 dependencies couldn't be built
guix pull: error: build of `/gnu/store/0jy3im4i9lkcjj2rqp48z9skb7w6wm66-profile.drv' failed

And the guix-packages.drv.bz2 file contains:

(repl-version 0 1 1)
(exception unbound-variable (value #f) (value "Unbound variable: ~S") (value (rust-1.39)) (value #f))