check flags:    
building check-recursive
Making check in lib
make[1]: Entering directory `/tmp/nix-build-7dw45i985wjv2617cd0m9m7r0iai8y4i-ptable-support.drv-0/ptable-support-1.2/lib'
make[1]: Nothing to be done for `check'.
make[1]: Leaving directory `/tmp/nix-build-7dw45i985wjv2617cd0m9m7r0iai8y4i-ptable-support.drv-0/ptable-support-1.2/lib'
make[1]: Entering directory `/tmp/nix-build-7dw45i985wjv2617cd0m9m7r0iai8y4i-ptable-support.drv-0/ptable-support-1.2'
make[1]: Nothing to be done for `check-am'.
make[1]: Leaving directory `/tmp/nix-build-7dw45i985wjv2617cd0m9m7r0iai8y4i-ptable-support.drv-0/ptable-support-1.2'