diff --git a/Cargo.lock b/Cargo.lock
index fc0a3d4..6bf9537 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -936,7 +936,7 @@ checksum = "8fcfdc7a0362c9f4444381a9e697c79d435fe65b52a37466fc2c1184cee9edc6"
 
 [[package]]
 name = "fitnesstrax"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "async-channel",
  "async-trait",
diff --git a/Cargo.nix b/Cargo.nix
index 953acc3..e9f3042 100644
--- a/Cargo.nix
+++ b/Cargo.nix
@@ -185,6 +185,16 @@ rec {
       # File a bug if you depend on any for non-debug work!
       debug = internal.debugCrate { inherit packageId; };
     };
+    "icon-test" = rec {
+      packageId = "icon-test";
+      build = internal.buildRustCrateWithFeatures {
+        packageId = "icon-test";
+      };
+
+      # Debug support which might change between releases.
+      # File a bug if you depend on any for non-debug work!
+      debug = internal.debugCrate { inherit packageId; };
+    };
     "ifc" = rec {
       packageId = "ifc";
       build = internal.buildRustCrateWithFeatures {
@@ -2979,7 +2989,7 @@ rec {
       };
       "fitnesstrax" = rec {
         crateName = "fitnesstrax";
-        version = "0.3.0";
+        version = "0.4.0";
         edition = "2021";
         crateBin = [
           {
@@ -3023,6 +3033,11 @@ rec {
             name = "ft-core";
             packageId = "ft-core";
           }
+          {
+            name = "gdk4";
+            packageId = "gdk4";
+            rename = "gdk";
+          }
           {
             name = "gio";
             packageId = "gio";
@@ -5713,6 +5728,46 @@ rec {
           }
         ];
 
+      };
+      "icon-test" = rec {
+        crateName = "icon-test";
+        version = "0.1.0";
+        edition = "2021";
+        crateBin = [
+          {
+            name = "icon-test";
+            path = "src/main.rs";
+            requiredFeatures = [ ];
+          }
+        ];
+        # We can't filter paths with references in Nix 2.4
+        # See https://github.com/NixOS/nix/issues/5410
+        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
+          then lib.cleanSourceWith { filter = sourceFilter;  src = ./icon-test; }
+          else ./icon-test;
+        dependencies = [
+          {
+            name = "gio";
+            packageId = "gio";
+          }
+          {
+            name = "glib";
+            packageId = "glib";
+          }
+          {
+            name = "gtk4";
+            packageId = "gtk4";
+            rename = "gtk";
+            features = [ "v4_10" ];
+          }
+          {
+            name = "libadwaita";
+            packageId = "libadwaita";
+            rename = "adw";
+            features = [ "v1_4" ];
+          }
+        ];
+
       };
       "idna 0.1.5" = rec {
         crateName = "idna";
diff --git a/fitnesstrax/app/Cargo.toml b/fitnesstrax/app/Cargo.toml
index 2e7a012..64a1e2b 100644
--- a/fitnesstrax/app/Cargo.toml
+++ b/fitnesstrax/app/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "fitnesstrax"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html