I admittedly don't really know how SSH is built but it looks to me like the patch that "makes" it HPN-SSH is already present upstream[1], it's just not applied

I admittedly don't really know how SSH is built but it looks to me like the patch that "makes" it HPN-SSH is already present upstream[1], it's just not applied by default? Nixpkgs seems to allow you to build the pkg with the patch [2]. [1] https://github.com/freebsd/freebsd-ports/blob/main/security/openssh-portable/files/extra-patch-hpn https://github.com/freebsd/freebsd-ports/blob/main/security/... [2] https://github.com/NixOS/nixpkgs/blob/d85ef06512a3afbd6f90825dd8f5b6cef017bdd6/pkgs/tools/networking/openssh/default.nix#L40 https://github.com/NixOS/nixpkgs/blob/d85ef06512a3afbd6f9082...