Backtrace:
          14 (primitive-load "/gnu/store/hy9z7sakk59881q3sqhy1pi0zsm?")
In ice-9/eval.scm:
   214:21 13 (_ #f)
   217:50 12 (lp (#<procedure 7fffeef7d900 at ice-9/eval.scm:282:?> ?))
   217:50 11 (lp (#<procedure 7fffeef7d8e0 at ice-9/eval.scm:282:?> ?))
   217:50 10 (lp (#<procedure 7fffeef7d8c0 at ice-9/eval.scm:282:?> ?))
   217:50  9 (lp (#<procedure 7fffeef7d8a0 at ice-9/eval.scm:282:?> ?))
   217:50  8 (lp (#<procedure 7fffeef7d880 at ice-9/eval.scm:282:?> ?))
   217:50  7 (lp (#<procedure 7fffeef7d860 at ice-9/eval.scm:282:?> ?))
   217:50  6 (lp (#<procedure 7fffeef7d840 at ice-9/eval.scm:282:?> ?))
   217:50  5 (lp (#<procedure 7fffeef7d820 at ice-9/eval.scm:282:?> ?))
   217:33  4 (lp (#<procedure 7fffeef7d6e0 at ice-9/eval.scm:649:?> ?))
   293:34  3 (_ #<directory (guile-user) 7fffeffcfc80>)
   196:35  2 (_ #<directory (guile-user) 7fffeffcfc80>)
   223:20  1 (proc #<directory (guile-user) 7fffeffcfc80>)
In unknown file:
           0 (%resolve-variable (7 . %build-inputs) #<directory (gui?>)

ERROR: In procedure %resolve-variable:
Unbound variable: %build-inputs