adc5cb1f8a
The package `nawk` seems to supply the binary `nawk` not `awk`, not sure if this was always thus, or if this is a new change.
```
$ tree `nix eval -f '<nixpkgs>' --raw nawk`
/nix/store/jji0m1by0nks2pdplk6xpwqq0dz8qy2s-nawk-unstable-2021-02-15
├── bin
│ └── nawk
└── share
└── man
└── man1
└── nawk.1.gz
```