check flags:    
building check-recursive
Making check in lib
make[1]: Entering directory `/tmp/nix-build-1hzc9v8mnmm01rqm0s5b8nqd96vfq0z1-tide-support.drv-0/tide-support-1.3.1/lib'
make[1]: Nothing to be done for `check'.
make[1]: Leaving directory `/tmp/nix-build-1hzc9v8mnmm01rqm0s5b8nqd96vfq0z1-tide-support.drv-0/tide-support-1.3.1/lib'
make[1]: Entering directory `/tmp/nix-build-1hzc9v8mnmm01rqm0s5b8nqd96vfq0z1-tide-support.drv-0/tide-support-1.3.1'
make[1]: Nothing to be done for `check-am'.
make[1]: Leaving directory `/tmp/nix-build-1hzc9v8mnmm01rqm0s5b8nqd96vfq0z1-tide-support.drv-0/tide-support-1.3.1'