Change:
Package Request: is a way of being able to do agent forwarding when using mosh. It also allows verifying commands being executed. I don't fully understand how it works, but it seems valuable, especially as I shift back to using on high-latency links.
This project looks abandoned, it has been released as as beta in 2017.
Hm, disappointing, but good point. I opened this to confirm:
I'm not really sure if we should proceed. I was going to close it, based on the response to the issue I filed on the guardian-agent repo, but I see you have a PR open now...
while I thought the same, I changed my mind because of two things. First of all there is sadly no alternative to this and mosh won't implement one, they own recommendation is actually using guardian-agent (as per ). And in the second place, the author of the project, Dima Kogan, did reply to my mail almost instantly, so while this is marked as beta, I think we should ship it with NixOS and help catch any outstanding bugs/problems with it.

Discussion:
<ins> { buildGoPackage , fetchFromGitHub , lib , autossh , makeWrapper }: buildGoPackage rec { pname = "guardian-agent"; version = "0.7.2"; src = fetchFromGitHub { owner = "StanfordSNR"; repo = pname; rev = "v${version}-beta"; sha256 = "05269y944hcabn6dqa66387rdhx81vcqcyjv6m1hdbz5ba8j7mqn"; }; nativeBuildInputs = [ makeWrapper ]; goPackagePath = "github.com/StanfordSNR/guardian-agent"; goDeps = ./deps.nix; postInstall = '' mkdir -p $bin/bin $out/share/doc/${pname} cp -v ./go/src/github.com/StanfordSNR/${pname}/scripts/* $bin/bin/ cp -vr ./go/src/github.com/StanfordSNR/${pname}/{AUTHORS,doc,LICENSE,README.md} $out/share/doc/guardian-agent ''; postFixup = '' wrapProgram $bin/bin/sga-guard  --prefix PATH : "$bin/bin"  --prefix PATH : "${autossh}/bin" ''; meta = with lib; { description = "Secure ssh-agent forwarding for Mosh and SSH"; homepage = "https://github.com/StanfordSNR/guardian-agent"; license = licenses.bsd3; maintainers = with maintainers; [ mmahut ]; platforms = platforms.unix; }; } </ins>

<ins> # This file was generated by https://github.com/kamilchm/go2nix v1.3.0 [ { goPackagePath = "github.com/hashicorp/yamux"; fetch = { type = "git"; url = "https://github.com/hashicorp/yamux"; rev = "2f1d1f20f75d5404f53b9edf6b53ed5505508675"; sha256 = "1fga3p6j2g24ip9qjfwn3nqjr00m4nnjz92app7ms3sz7vgq2a7s"; }; } { goPackagePath = "github.com/howeyc/gopass"; fetch = { type = "git"; url = "https://github.com/howeyc/gopass"; rev = "bf9dde6d0d2c004a008c27aaee91170c786f6db8"; sha256 = "1jxzyfnqi0h1fzlsvlkn10bncic803bfhslyijcxk55mgh297g45"; }; } { goPackagePath = "github.com/sternhenri/interact"; fetch = { type = "git"; url = "https://github.com/sternhenri/interact"; rev = "dfeb9ef2030483f98cee2c86f5775fe6c729f10b"; sha256 = "00b09fyy9zhv11mbzm18ngg765g0gyb23bmr4fc83i09w912if7j"; }; } { goPackagePath = "golang.org/x/sys"; fetch = { type = "git"; url = "https://go.googlesource.com/sys"; rev = "04f50cda93cbb67f2afa353c52f342100e80e625"; sha256 = "0hmfsz9y1ingwsn482hlzzmzs7kr3cklm0ana0mbdk70isw2bxnw"; }; } { goPackagePath = "golang.org/x/crypto"; fetch = { type = "git"; url = "https://github.com/StanfordSNR/crypto"; rev = "e451cabda2acd7a416728ee89b75975b8b0c90d7"; sha256 = "0aj6fc0i1dm6rdgr1mlv2pl4s0i6sj821k2p4gig45h5mn06mhpz"; }; } { goPackagePath = "github.com/jessevdk/go-flags"; fetch = { type = "git"; url = "https://github.com/jessevdk/go-flags"; rev = "c0795c8afcf41dd1d786bebce68636c199b3bb45"; sha256 = "0xsmr17mrpm9kx34zfzzirwy0n459h975x49p41fs2f6ly6lk9vp"; }; } ] </ins>

guake = callPackage ../applications/misc/guake { }; <ins> guardian-agent = callPackage ../tools/networking/guardian-agent { }; </ins> guitone = callPackage ../applications/version-management/guitone { graphviz = graphviz_2_32; };