check flags:    
[pbuilding check-recursive
Making check in lib
[pmake[1]: Entering directory `/tmp/nix-build-w0300hcs0wk8vxlz6jswcjvag248a3ii-asf-support.drv-0/asf-support-1.8/lib'
make[1]: Nothing to be done for `check'.
make[1]: Leaving directory `/tmp/nix-build-w0300hcs0wk8vxlz6jswcjvag248a3ii-asf-support.drv-0/asf-support-1.8/lib'
[q[pmake[1]: Entering directory `/tmp/nix-build-w0300hcs0wk8vxlz6jswcjvag248a3ii-asf-support.drv-0/asf-support-1.8'
make[1]: Nothing to be done for `check-am'.
make[1]: Leaving directory `/tmp/nix-build-w0300hcs0wk8vxlz6jswcjvag248a3ii-asf-support.drv-0/asf-support-1.8'
[q[q