squeekboard log

phase `configure' succeeded after 4.1 seconds
starting phase `meson-configure'
error: in phase 'meson-configure': uncaught exception:
wrong-type-arg "string-append" "Wrong type (expecting ~A): ~S" ("string" #f) (#f)
phase `meson-configure' failed after 0.0 seconds
Backtrace:
           9 (primitive-load "/gnu/store/1v69dv79g7bckvmjjlsfngp1l6f?")
In guix/build/gnu-build-system.scm:
    904:2  8 (gnu-build #:source _ #:outputs _ #:inputs _ #:phases . #)
In ice-9/boot-9.scm:
  1752:10  7 (with-exception-handler _ _ #:unwind? _ # _)
In srfi/srfi-1.scm:
    634:9  6 (for-each #<procedure 7fffeed7afa0 at guix/build/gnu-b?> ?)
In ice-9/boot-9.scm:
  1752:10  5 (with-exception-handler _ _ #:unwind? _ # _)
In guix/build/gnu-build-system.scm:
   925:23  4 (_)
In guix/build/meson-build-system.scm:
    48:18  3 (configure #:outputs _ #:configure-flags _ #:build-type _)
In unknown file:
           2 (string-append "--buildtype=" #f)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure string-append: Wrong type (expecting string): #f
builder for `/gnu/store/xdxg36zn5lbc2jxs3w4d59xkz9w94kzn-squeekboard-1.15.0.drv' failed with exit code 1
build of /gnu/store/xdxg36zn5lbc2jxs3w4d59xkz9w94kzn-squeekboard-1.15.0.drv failed
View build log at '/var/log/guix/drvs/xd/xg36zn5lbc2jxs3w4d59xkz9w94kzn-squeekboard-1.15.0.drv.bz2'.
guix build: error: build of `/gnu/store/xdxg36zn5lbc2jxs3w4d59xkz9w94kzn-squeekboard-1.15.0.drv' failed