Ran into a bug, according to guix pull. It told me to report it here:
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Updating channel 'nonguix' from Git repository at 'https://gitlab.com/nonguix/nonguix'...
Building from these channels:
guix https://git.savannah.gnu.org/git/guix.git fc27362
nonguix https://gitlab.com/nonguix/nonguix c29a9af
Computing Guix derivation for 'x86_64-linux'... /Backtrace:
17 (primitive-load "/gnu/store/gbvip4pg6yhrpfwn1w63zrsw4s7lj9bs-compute-guix-derivation")
159:9 15 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
152:2 14 (with-fluid* _ _ _)
152:2 13 (with-fluid* _ _ _)
2210:24 12 (run-with-store #<store-connection 256.100 7f7d306df050> #<procedure 7f7d278a52d0 at guix/self.scm:136?> ?)
1365:2 11 (_ #<store-connection 256.100 7f7d306df050>)
2113:17 10 (_ #<store-connection 256.100 7f7d306df050>)
2210:24 9 (run-with-store #<store-connection 256.100 7f7d306df050> #<procedure 7f7d278dca40 at guix/store.scm:20?> ?)
2038:13 8 (_ #<store-connection 256.100 7f7d306df050>)
1692:16 6 (cache! #<weak-table 0/223> #<package guile@3.0.9 7f7d27326790> ("x86_64-linux" #f) #<procedure thunk ()>)
155:9 4 (_ #(#(#<directory (gnu packages guile) 7f7d2d928aa0>) #<package guile@3.0.9 7f7d27326790>))
163:9 3 (_ #(#(#<directory (gnu packages guile) 7f7d2d928aa0>) #<package guile@3.0.9 7f7d27326790>))
159:9 2 (_ #(#(#<directory (gnu packages guile) 7f7d2d928aa0>) #<package guile@3.0.9 7f7d27326790>))
223:20 1 (proc #(#(#<directory (gnu packages guile) 7f7d2d928aa0>) #<package guile@3.0.9 7f7d27326790>))
0 (%resolve-variable (7 . libffi) #<directory (gnu packages guile) 7f7d2d928aa0>)
ERROR: In procedure %resolve-variable:
error: libffi: unbound variable
guix pull: error: You found a bug: the program '/gnu/store/gbvip4pg6yhrpfwn1w63zrsw4s7lj9bs-compute-guix-derivation'
failed to compute the derivation for Guix (version: "fc27362f8d6e45149c4f8f725462f7d20c9efb2c"; system: "x86_64-linux";
host version: "dc50af1ca527af0ef03dae4eef3757272428b1a7"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.