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 c29a9afComputing Guix derivation for 'x86_64-linux'... /Backtrace:          17 (primitive-load "/gnu/store/gbvip4pg6yhrpfwn1w63zrsw4s7lj9bs-compute-guix-derivation")In ice-9/eval.scm:    155:9 16 (_ _)    159:9 15 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))In ice-9/boot-9.scm:    152:2 14 (with-fluid* _ _ _)    152:2 13 (with-fluid* _ _ _)In guix/store.scm:  2210:24 12 (run-with-store #<store-connection 256.100 7f7d306df050> #<procedure 7f7d278a52d0 at guix/self.scm:136?> ?)In guix/self.scm:   1365:2 11 (_ #<store-connection 256.100 7f7d306df050>)In guix/packages.scm:  2113:17 10 (_ #<store-connection 256.100 7f7d306df050>)In guix/store.scm:  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>)In guix/packages.scm:  2055:40  7 (_)  1692:16  6 (cache! #<weak-table 0/223> #<package guile@3.0.9 7f7d27326790> ("x86_64-linux" #f) #<procedure thunk ()>)  1793:48  5 (thunk)In ice-9/eval.scm:    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>))In unknown file:           0 (%resolve-variable (7 . libffi) #<directory (gnu packages guile) 7f7d2d928aa0>)
ERROR: In procedure %resolve-variable:error: libffi: unbound variableguix 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>.