bug#41211: texlive-luatex-luaotfload fails to build

[Ricardo Wurmus <rekado@elephly.net>]

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starting phase `configure'
Backtrace:
          19 (primitive-load "/gnu/store/4f9lljysahpgjjlzw02dvnhajnk…")
In ice-9/eval.scm:
   191:35 18 (_ _)
In guix/build/gnu-build-system.scm:
    838:2 17 (gnu-build #:source _ #:outputs _ #:inputs _ #:phases . #)
In ice-9/boot-9.scm:
  1736:10 16 (with-exception-handler _ _ #:unwind? _ # _)
In srfi/srfi-1.scm:
   857:16 15 (every1 #<procedure 7ffff4f2fc20 at guix/build/gnu-bui…> …)
In guix/build/gnu-build-system.scm:
   847:30 14 (_ _)
In ice-9/eval.scm:
    619:8 13 (_ #(#(#<directory (guile-user) 7ffff5bb9f00>) (# # …)))
In ice-9/boot-9.scm:
  1736:10 12 (with-exception-handler _ _ #:unwind? _ # _)
In ice-9/ports.scm:
   445:17 11 (call-with-input-file _ _ #:binary _ #:encoding _ # _)
In guix/build/utils.scm:
   741:26 10 (_ _)
   767:26  9 (_ #<input: scripts/mkstatus 11> #<input-output: script…>)
In srfi/srfi-1.scm:
   460:18  8 (fold #<procedure 7ffff51f1040 at guix/build/utils.scm…> …)
In ice-9/eval.scm:
   202:51  7 (_ #(#(#(#(#(#(#<directory (guile-user)…> …)) …) …) …) …))
    163:9  6 (_ #(#(#(#(#(#(#<directory (guile-user)…> …)) …) …) …) …))
    163:9  5 (_ #(#(#(#(#(#(#<directory (guile-user)…> …)) …) …) …) …))
    155:9  4 (_ #(#(#(#(#(#(#<directory (guile-user)…> …)) …) …) …) …))
In ice-9/boot-9.scm:
   222:17  3 (map1 ((committer . "Philipp Gesang <phg@phi-gamma.…") …))
In ice-9/format.scm:
     50:8  2 (format "[\"~a\"]=\"~a\"," "committer" "Philipp Gesang …")
In ice-9/boot-9.scm:
  1669:16  1 (raise-exception _ #:continuable? _)
  1669:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1669:16: In procedure raise-exception:
format: bad destination `~a' "[\"~a\"]=\"~a\","
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-- 
Ricardo