Backtrace:
In ice-9/boot-9.scm:
   222:29 19 (map1 (((gnu packages photo)) ((gnu packages tor)) (#) …))
   222:29 18 (map1 (((gnu packages tor)) ((gnu packages uml)) ((…)) …))
   222:29 17 (map1 (((gnu packages uml)) ((gnu packages finance)) # …))
   222:29 16 (map1 (((gnu packages finance)) ((gnu packages #)) (#) …))
   222:29 15 (map1 (((gnu packages ocaml)) ((gnu packages erlang)) …))
   222:29 14 (map1 (((gnu packages erlang)) ((gnu packages #)) (#) …))
   222:29 13 (map1 (((gnu packages statistics)) ((gnu packages #)) …))
   222:29 12 (map1 (((gnu packages libcanberra)) ((gnu packages …)) …))
   222:17 11 (map1 (((gnu packages telegram)) ((gnu packages #)) # …))
  3327:17 10 (resolve-interface (gnu packages telegram) #:select _ # …)
In ice-9/threads.scm:
    390:8  9 (_ _)
In ice-9/boot-9.scm:
  3253:13  8 (_)
In ice-9/threads.scm:
    390:8  7 (_ _)
In ice-9/boot-9.scm:
  3544:20  6 (_)
   2836:4  5 (save-module-excursion #<procedure 7f8447579ae0 at ice-…>)
  3564:26  4 (_)
In unknown file:
           3 (primitive-load-path "gnu/packages/telegram" #<procedur…>)
In gnu/packages/telegram.scm:
   442:14  2 (_)
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:
error: tdlib: unbound variable