diff --git a/flake.lock b/flake.lock
index 2f0508e..cfadb71 100644
--- a/flake.lock
+++ b/flake.lock
@@ -180,11 +180,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1708031129,
-        "narHash": "sha256-EH20hJfNnc1/ODdDVat9B7aKm0B95L3YtkIRwKLvQG8=",
+        "lastModified": 1708806879,
+        "narHash": "sha256-MSbxtF3RThI8ANs/G4o1zIqF5/XlShHvwjl9Ws0QAbI=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "3d6791b3897b526c82920a2ab5f61d71985b3cf8",
+        "rev": "4ee704cb13a5a7645436f400b9acc89a67b9c08a",
         "type": "github"
       },
       "original": {
@@ -202,24 +202,24 @@
       "locked": {
         "lastModified": 1706522977,
         "narHash": "sha256-Tq69CQ+uutfY477w8uCRyF/2V0Wh/+zHzM3qwcVmqsk=",
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "TruckSimulatorBot-images",
         "rev": "d54a772d48a329a402433cc90502700a6699008e",
         "type": "github"
       },
       "original": {
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "TruckSimulatorBot-images",
         "type": "github"
       }
     },
     "impermanence": {
       "locked": {
-        "lastModified": 1706639736,
-        "narHash": "sha256-CaG4j9+UwBDfinxxvJMo6yOonSmSo0ZgnbD7aj2Put0=",
+        "lastModified": 1708968331,
+        "narHash": "sha256-VUXLaPusCBvwM3zhGbRIJVeYluh2uWuqtj4WirQ1L9Y=",
         "owner": "nix-community",
         "repo": "impermanence",
-        "rev": "cd13c2917eaa68e4c49fea0ff9cada45440d7045",
+        "rev": "a33ef102a02ce77d3e39c25197664b7a636f9c30",
         "type": "github"
       },
       "original": {
@@ -281,11 +281,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1708225687,
-        "narHash": "sha256-NJBDfvknI26beOFmjO2coeJMTTUCCtw2Iu+rvJ1Zb9k=",
+        "lastModified": 1708830466,
+        "narHash": "sha256-nGKe3Y1/jkLR2eh1aRSVBtKadMBNv8kOnB52UXqRy6A=",
         "owner": "nix-community",
         "repo": "nix-index-database",
-        "rev": "17352eb241a8d158c4ac523b19d8d2a6c8efe127",
+        "rev": "f070c7eeec3bde8c8c8baa9c02b6d3d5e114d73b",
         "type": "github"
       },
       "original": {
@@ -296,11 +296,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1708118438,
-        "narHash": "sha256-kk9/0nuVgA220FcqH/D2xaN6uGyHp/zoxPNUmPCMmEE=",
+        "lastModified": 1708807242,
+        "narHash": "sha256-sRTRkhMD4delO/hPxxi+XwLqPn8BuUq6nnj4JqLwOu0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5863c27340ba4de8f83e7e3c023b9599c3cb3c80",
+        "rev": "73de017ef2d18a04ac4bfd0c02650007ccb31c2a",
         "type": "github"
       },
       "original": {
@@ -349,13 +349,13 @@
       "locked": {
         "lastModified": 1698315015,
         "narHash": "sha256-RWYymaHHx6pi4HRLfJJTF3u4Im22uUtVZDUvTbP0Qrc=",
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "pfersel",
         "rev": "40292aa59ed9f6630dc39405f318842a9c8e7cb3",
         "type": "github"
       },
       "original": {
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "pfersel",
         "type": "github"
       }
@@ -400,13 +400,13 @@
       "locked": {
         "lastModified": 1706780558,
         "narHash": "sha256-tZRNaZKENRzd83oLgqgG/G2A+7FgsISFhgblGjFM244=",
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "purge",
         "rev": "3875053bd588aeee14849c50c60f6a33ac784da3",
         "type": "github"
       },
       "original": {
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "purge",
         "type": "github"
       }
@@ -488,15 +488,15 @@
         ]
       },
       "locked": {
-        "lastModified": 1706780552,
-        "narHash": "sha256-qXEAZNReY2jeoxLO/uZmZMOEOQq6BRq/Mh20BQGF2Bs=",
-        "owner": "therealr5",
+        "lastModified": 1708375524,
+        "narHash": "sha256-6XxKJhGupxakfrz8GBJJ/l9RvLs3tt9wuj3c8MZoSuo=",
+        "owner": "rouven0",
         "repo": "TruckSimulatorBot",
-        "rev": "88194a54c984fb91090c00d116c821627af9ed2f",
+        "rev": "6b33532486100f83fc9c7f2da3d1b54ea4fe5986",
         "type": "github"
       },
       "original": {
-        "owner": "therealr5",
+        "owner": "rouven0",
         "repo": "TruckSimulatorBot",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 54e1d98..f2b7da7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,15 +26,15 @@
     nix-colors.url = "github:Misterio77/nix-colors";
 
     purge = {
-      url = "github:therealr5/purge";
+      url = "github:rouven0/purge";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     trucksimulatorbot = {
-      url = "github:therealr5/TruckSimulatorBot";
+      url = "github:rouven0/TruckSimulatorBot";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     pfersel = {
-      url = "github:therealr5/pfersel";
+      url = "github:rouven0/pfersel";
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
diff --git a/overlays/default.nix b/overlays/default.nix
index 8cda764..b03b091 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -8,17 +8,14 @@ let
   inherit (prev) python3Packages;
 in
 rec {
-  pcmanfm = prev.pcmanfm.overrideAttrs (_: {
-    # remove deskop preferences shortcut
-    postInstall = ''
-      rm $out/share/applications/pcmanfm-desktop-pref.desktop
-    '';
-  });
-
   pww = callPackage ../pkgs/pww { };
   ianny = callPackage ../pkgs/ianny { };
 
   tpm2-pkcs11 = prev.tpm2-pkcs11.override { fapiSupport = false; };
+  imv = prev.imv.override {
+    # freeimage is broken
+    withBackends = [ "libtiff" "libjpeg" "libpng" "librsvg" "libheif" ];
+  };
 
   gnome-break-timer = callPackage ../pkgs/gnome-break-timer { };
   jmri = callPackage ../pkgs/jmri { };
diff --git a/shared/nix.nix b/shared/nix.nix
index f428010..ba3d866 100644
--- a/shared/nix.nix
+++ b/shared/nix.nix
@@ -6,15 +6,16 @@
       nixpkgs.flake = nixpkgs;
     };
     nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
-    # keep build-time deps around for offline-rebuilding
     settings = {
       auto-optimise-store = true;
       experimental-features = [ "nix-command" "flakes" "repl-flake" ];
       substituters = [
         "https://cache.rfive.de"
+        "https://cache.ifsr.de"
       ];
       trusted-public-keys = [
         "cache.rfive.de:of5d+o6mfGXQSR3lk6ApfDBr4ampAUaNHux1O/XY3Tw="
+        "cache.ifsr.de:y55KBAMF4YkjIzXwYOKVk9fcQS+CZ9RM1zAAMYQJtsg="
       ];
     };
   };