bug#48595: `guix install mes` fails in 'check'-phase

[Gabriel Wicki]

i tried running `guix install mes` which fails on my x86_64 debian
machine. CI fails as well
(https://ci.guix.gnu.org/build/286577/details).

log output shows a couple of segmentation faults and an undefined
variable in phase 'check':

test/test10/hello.sh
+ '[' amd64 = amd64 ']'
+ ./test/results/test1-binary
+ . ./sha256.sh
++ set -ex
test/test1/hello.sh: line 37:   171 Segmentation fault      
./test/results/test1-binary < test/test1/hex0.hex0 > test/test1/proof1
+ '[' amd64 = x86 ']'
+ exit 0
make: *** [makefile:104: test1-binary] Error 139
[...]
test/test7/hello.sh: line 31:   175 Segmentation fault      
./test/results/test7-binary test/test7/hex1.hex1 > test/test7/proof
[...]
test/test3/hello.sh: line 23: GET_MACHINE_FLAGS: unbound variable