NixOS - flake update SSL connect error

Ahoj kamarádi,

nemůžete mi prosím poradit, co dělám špatně? Když na NixOS (hostovaném tady) spustím sudo nix flake update --flake /etc/nixos tak dostanu tyhle chyby:

warning: unable to download 'https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 336 ms (attempt 1/5)
warning: unable to download 'https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 573 ms (attempt 2/5)
warning: unable to download 'https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 1167 ms (attempt 3/5)
warning: unable to download 'https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 2809 ms (attempt 4/5)
warning: unable to download 'https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; using cached version
warning: unable to download 'https://api.github.com/repos/vpsfreecz/vpsadminos/commits/HEAD': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 285 ms (attempt 1/5)
warning: unable to download 'https://api.github.com/repos/vpsfreecz/vpsadminos/commits/HEAD': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 689 ms (attempt 2/5)
warning: unable to download 'https://api.github.com/repos/vpsfreecz/vpsadminos/commits/HEAD': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 1105 ms (attempt 3/5)
warning: unable to download 'https://api.github.com/repos/vpsfreecz/vpsadminos/commits/HEAD': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; retrying in 2635 ms (attempt 4/5)
warning: unable to download 'https://api.github.com/repos/vpsfreecz/vpsadminos/commits/HEAD': SSL connect error (35) TLS connect error: error:0A000410:SSL routines::ssl/tls alert handshake failure; using cached version

Když na stejném stroji spustím

curl "https://api.github.com/repos/NixOS/nixpkgs/commits/nixos-26.05"

tak se mi soubor bez problému ukáže

{
  "sha": "6fcc160353f63555b560f25588925133c8f61f2a",
  "node_id": "C_kwDOAEVQ_NoAKDZmY2MxNjAzNTNmNjM1NTViNTYwZjI1NTg4OTI1MTMzYzhmNjFmMmE",
  "commit": {
    "author": {
      "name": "Martin Weinelt",
      "email": "mweinelt@users.noreply.github.com",
      "date": "2026-10-10T19:57:59Z"
    },
    "committer": {
      "name": "GitHub",
      "email": "noreply@github.com",
      "date": "2026-10-10T19:57:59Z"
    },
    "message": "[Backport release-26.05] python315: 3.15.0rc2 -> 3.15.0 (#572243)",
    "tree": {
      "sha": "2a92fb09dc4819c62dd0438a570cbf1ff36085db",
      "url": "https://api.github.com/repos/NixOS/nixpkgs/git/trees/2a92fb09dc4819c62dd0438a570cbf1ff36085db"
    },
    "url": "https://api.github.com/repos/NixOS/nixpkgs/git/commits/6fcc160353f63555b560f25588925133c8f61f2a",
    "comment_count": 0,
    "verification": {
      "verified": true,
...

Snažil jsem se hledat na netu i radit s AI, ale bez úspěchu. S NixOS si hraji teprve chvíli, takže mi asi něco uniká :person_shrugging: