On Linux, network access isn't available inside of a build. It seems tobuild correctly without this `preBuild` hook.See:#14728 (comment)```$ nix developwarning: Git tree '/home/colin/Projects/coder/coder' is dirtyerror: builder for '/nix/store/wg14v4ylmjrf2krlxbk6a049nvc23zad-protoc-gen-go.drv' failed with exit code 1;       last 10 log lines:       > calling 'postUnpack' function hook '_updateSourceDateEpochFromSourceRoot'       > Running phase: patchPhase       > Running phase: updateAutotoolsGnuConfigScriptsPhase       > Running phase: configurePhase       > calling 'preConfigure' function hook '_multioutConfig'       > Running phase: buildPhase       > evaling implicit 'preBuild' string hook       > go: github.com/golang/protobuf@v1.5.0: Get "https://proxy.golang.org/github.com/golang/protobuf/@v/v1.5.0.info": dial tcp: lookup proxy.golang.org on [::1]:53: read udp [::1]:33535->[::1]:53: read: connection refused       > go: github.com/google/go-cmp@v0.5.5: Get "https://proxy.golang.org/github.com/google/go-cmp/@v/v0.5.5.info": dial tcp: lookup proxy.golang.org on [::1]:53: read udp [::1]:54889->[::1]:53: read: connection refused       > /nix/store/5r0df66ikad3xw06azlqvswcvncll8wa-stdenv-linux/setup: line 193: pop_var_context: head of shell_variables not a function context       For full logs, run 'nix log /nix/store/wg14v4ylmjrf2krlxbk6a049nvc23zad-protoc-gen-go.drv'.error: 1 dependencies of derivation '/nix/store/z9ik49f82idmhi99ra9zvd3q38cqsg9s-nix-shell-env.drv' failed to build```

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