this does not fix the build of lyx and twinkle for me, which both fail at 'qt-wrap:
---snip---
starting phase `qt-wrap'
error: in phase 'qt-wrap': uncaught exception:
wrong-type-arg "substring" "Wrong type argument in position ~A (expecting ~A): ~S" (1 "string" #f) (#f)
phase `qt-wrap' failed after 0.0 seconds
Backtrace:
9 (primitive-load "/gnu/store/gm47sv2ndfg906vkdr68nbv7zsi…")
In guix/build/gnu-build-system.scm:
906:2 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 7ffff0b45020 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:
927:23 4 (_)
In guix/build/qt-utils.scm:
148:22 3 (wrap-all-qt-programs #:inputs _ #:outputs _ #:qtbase _ …)
In unknown file:
2 (string-drop #f 44)
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 substring: Wrong type argument in position 1 (expecting string): #f
---snap---
Maybe a different incarnation of the same issue?
Lars