flake: move inputs away from github

Flake lock file updates:

• Updated input 'my-nixpkgs':
    'github:qaristote/my-nixpkgs/e91ce613347c1db230413d3f60236fb8823ec33f' (2026-01-25)
  → 'git+https://git.aristote.fr/nix/my-nixpkgs?ref=refs/heads/master&rev=e91ce613347c1db230413d3f60236fb8823ec33f' (2026-01-25)

1 files changed, 6 insertions, 6 deletions

diff --git a/flake.lock b/flake.lock
index 9bb2c4c..a377c2d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -48,15 +48,15 @@
       "locked": {
         "lastModified": 1769379661,
         "narHash": "sha256-IwzvzWpEdBZRGTCJajk29SP++DoiVABPVwES+yhVIC8=",
-        "owner": "qaristote",
-        "repo": "my-nixpkgs",
+        "ref": "refs/heads/master",
         "rev": "e91ce613347c1db230413d3f60236fb8823ec33f",
-        "type": "github"
+        "revCount": 363,
+        "type": "git",
+        "url": "https://git.aristote.fr/nix/my-nixpkgs"
       },
       "original": {
-        "owner": "qaristote",
-        "repo": "my-nixpkgs",
-        "type": "github"
+        "type": "git",
+        "url": "https://git.aristote.fr/nix/my-nixpkgs"
       }
     },
     "nixos-hardware": {