check flags:    
building check-recursive
Making check in lib
make[1]: Entering directory `/private/tmp/nix-build-ai6wq6sbrzjffqx7ig4dvdksra7c2jhk-tide-support.drv-0/tide-support-1.3.1/lib'
make[1]: Nothing to be done for `check'.
make[1]: Leaving directory `/private/tmp/nix-build-ai6wq6sbrzjffqx7ig4dvdksra7c2jhk-tide-support.drv-0/tide-support-1.3.1/lib'
make[1]: Entering directory `/private/tmp/nix-build-ai6wq6sbrzjffqx7ig4dvdksra7c2jhk-tide-support.drv-0/tide-support-1.3.1'
make[1]: Nothing to be done for `check-am'.
make[1]: Leaving directory `/private/tmp/nix-build-ai6wq6sbrzjffqx7ig4dvdksra7c2jhk-tide-support.drv-0/tide-support-1.3.1'