check flags:    
building check-recursive
Making check in lib
make[1]: Entering directory `/private/tmp/nix-build-6l0v1fyi7xylv6z8yqh2xhpn0wjnyf8x-ptable-support.drv-0/ptable-support-1.2/lib'
make[1]: Nothing to be done for `check'.
make[1]: Leaving directory `/private/tmp/nix-build-6l0v1fyi7xylv6z8yqh2xhpn0wjnyf8x-ptable-support.drv-0/ptable-support-1.2/lib'
make[1]: Entering directory `/private/tmp/nix-build-6l0v1fyi7xylv6z8yqh2xhpn0wjnyf8x-ptable-support.drv-0/ptable-support-1.2'
make[1]: Nothing to be done for `check-am'.
make[1]: Leaving directory `/private/tmp/nix-build-6l0v1fyi7xylv6z8yqh2xhpn0wjnyf8x-ptable-support.drv-0/ptable-support-1.2'