...........................

make  all-am
make[1]: Entering directory '/tmp/yaourt-tmp-janne/aur-snapd/src/snapd-2.32.6/cmd'
sed -e 's,[@]SNAP_MOUNT_DIR[@],/var/lib/snapd/snap,' <snap-mgmt/snap-mgmt.sh.in >snap-mgmt/snap-mgmt
gcc -DHAVE_CONFIG_H -I.   -D_FORTIFY_SOURCE=2 -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes -Wno-missing-field-initializers -Wno-unused-parameter -Werror -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -D_ENABLE_FAULT_INJECTION -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -MT libsnap-confine-private/libsnap_confine_private_unit_tests-locking-test.o -MD -MP -MF libsnap-confine-private/.deps/libsnap_confine_private_unit_tests-locking-test.Tpo -c -o libsnap-confine-private/libsnap_confine_private_unit_tests-locking-test.o `test -f 'libsnap-confine-private/locking-test.c' || echo './'`libsnap-confine-private/locking-test.c
libsnap-confine-private/locking-test.c: In function ‘sc_test_use_fake_lock_dir’:
libsnap-confine-private/locking-test.c:53:24: error: cast between incompatible function types from ‘int (*)(const char *)’ to ‘void (*)(void *)’ [-Werror=cast-function-type]
   g_test_queue_destroy((GDestroyNotify) unsetenv,
                        ^
cc1: all warnings being treated as errors
make[1]: *** [Makefile:1979: libsnap-confine-private/libsnap_confine_private_unit_tests-locking-test.o] Error 1
make[1]: Leaving directory '/tmp/yaourt-tmp-janne/aur-snapd/src/snapd-2.32.6/cmd'
make: *** [Makefile:993: all] Error 2