diff --git a/flake.lock b/flake.lock
index b7a2b72..645c597 100644
--- a/flake.lock
+++ b/flake.lock
@@ -416,6 +416,7 @@
     "mattermost-webapp": {
       "flake": false,
       "locked": {
+        "lastModified": 1698237703,
         "narHash": "sha256-UI2nCRT7Jv3+r2iU8ncZXDunYISGTHcgVwz9nDzDdt0=",
         "type": "tarball",
         "url": "https://releases.mattermost.com/8.1.4/mattermost-8.1.4-linux-amd64.tar.gz"
@@ -514,16 +515,17 @@
         "waybar-iceportal": "waybar-iceportal"
       },
       "locked": {
-        "lastModified": 1698319137,
-        "narHash": "sha256-ehM84lQhK3LO8RGAbdW6GtQy+DO3j/GiUE5Du07FGjQ=",
+        "lastModified": 1698439383,
+        "narHash": "sha256-uKasluOPsB1HLlx5sAsYD27gIx5uFubMT4FqDILUmHQ=",
         "owner": "hexchen",
         "repo": "nixfiles",
-        "rev": "433d345cf4a9ff6d3ff450572bbec848b152436a",
+        "rev": "4bd4c81796b5e42e9498b894b539a711af5fd0a8",
         "type": "gitlab"
       },
       "original": {
         "owner": "hexchen",
         "repo": "nixfiles",
+        "rev": "4bd4c81796b5e42e9498b894b539a711af5fd0a8",
         "type": "gitlab"
       }
     },
@@ -654,11 +656,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1698288402,
-        "narHash": "sha256-jIIjApPdm+4yt8PglX8pUOexAdEiAax/DXW3S/Mb21E=",
+        "lastModified": 1698696950,
+        "narHash": "sha256-FHFL58t6lMumvWqwundC8fDDDLOIvc+JJBNIAlPjrDY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "60b9db998f71ea49e1a9c41824d09aa274be1344",
+        "rev": "017ef2132a5bda50bd713aeabce8f918502d4ec1",
         "type": "github"
       },
       "original": {
@@ -669,11 +671,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1697886341,
-        "narHash": "sha256-AdE67xPty9M9wn36nPVp6aDntIdigrs7UbyaGv1VAaM=",
+        "lastModified": 1698336494,
+        "narHash": "sha256-sO72WDBKyijYD1GcKPlGsycKbMBiTJMBCnmOxLAs880=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "44881e03af1c730cbb1d72a4d41274a2c957813a",
+        "rev": "808c0d8c53c7ae50f82aca8e7df263225cf235bf",
         "type": "github"
       },
       "original": {
@@ -880,11 +882,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1698273636,
-        "narHash": "sha256-swsqg/ckSVJnravx7ie9NFQSKIH27owtlk0wh4+xStk=",
+        "lastModified": 1698548647,
+        "narHash": "sha256-7c03OjBGqnwDW0FBaBc+NjfEBxMkza+dxZGJPyIzfFE=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "014e44d334a39481223a5d163530d4c4ca2e75cb",
+        "rev": "632c3161a6cc24142c8e3f5529f5d81042571165",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index be161d7..3af4e1e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,7 +9,9 @@
 
     nixpkgs.url = "nixpkgs/nixos-23.05";
     nixpkgs-oldstable.url = "github:/NixOS/nixpkgs?rev=c4aec3c021620d98861639946123214207e98344";
-    nix-hexchen.url = "gitlab:hexchen/nixfiles";
+    # TODO: unpin once the "No device specified for mount point ‘/persist’" has been solved (upstream?)
+    nix-hexchen.url = "gitlab:hexchen/nixfiles?rev=4bd4c81796b5e42e9498b894b539a711af5fd0a8";
+
     nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-23.05";
     tracktrain.url = "git+https://stuebinm.eu/git/tracktrain?ref=main";
     tracktrain.flake = false;