diff --git a/deps/sources.json b/deps/sources.json
index 46fecbc..9c6fcdc 100644
--- a/deps/sources.json
+++ b/deps/sources.json
@@ -156,6 +156,18 @@
       "url": null,
       "hash": "1pkfkijhysplmvxfcdpblx0kixbip3w0fr109j1dppp1id8iq456"
     },
+    "nix-hash-collection": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "JulienMalka",
+        "repo": "nix-hash-collection"
+      },
+      "branch": "main",
+      "revision": "e3f01d279c52e21b0e9f92f4ab76bfe4cfea7601",
+      "url": "https://github.com/JulienMalka/nix-hash-collection/archive/e3f01d279c52e21b0e9f92f4ab76bfe4cfea7601.tar.gz",
+      "hash": "1lmd61nqsrfx1ga1rhcdzm9k79gh53gl4q87b7i3a28014x699cr"
+    },
     "nix-index-database": {
       "type": "Git",
       "repository": {
diff --git a/machines/enigma/default.nix b/machines/enigma/default.nix
index 8dd2970..d8702cf 100644
--- a/machines/enigma/default.nix
+++ b/machines/enigma/default.nix
@@ -157,5 +157,12 @@
   # for a WiFi printer
   services.avahi.openFirewall = true;
 
+  services.hash-collection = {
+    enable = true;
+    collection-url = "https://reproducibility.nixos.social";
+    tokenFile = "/home/julien/lila-secrets/tokenfile";
+    secretKeyFile = "/home/julien/lila-secrets/secret.key";
+  };
+
   system.stateVersion = "23.05";
 }