(address . bug-guix@gnu.org)
Building gawk by hand, this is the problem it seems to be hitting (during the check phase):
============== _pty1 =============
*** pty1.ok 2017-12-14 17:53:45.000000000 +0000
--- _pty1 2020-05-10 10:06:11.000000000 +0100
**
*************
*** 1,2 ****
! 123
! x is abc
--- 1,4 ----
! sh: 1: cannot create /dev/tty: Permission denied
! sh: 1: cannot open
/dev/tty: Permission denied
! x is
! x is