diff --git a/pkgs/odysseus/derivation.nix b/pkgs/odysseus/derivation.nix
index c14d3e3..70c2061 100644
--- a/pkgs/odysseus/derivation.nix
+++ b/pkgs/odysseus/derivation.nix
@@ -96,9 +96,10 @@ let
     ps: (map (n: ps.${n}) reqNames) ++ extraDefault ps ++ extraFromExtras ps ++ extraPythonPackages ps
   );
 
-  # Single source of truth for the version: src/constants.py's APP_VERSION
-  # (the value the app serves at /version), parsed at eval time.
-  version = import ./version.nix { inherit src; };
+  # Hardcoded version - update this to match APP_VERSION in src/constants.py
+  # when updating the package. Using import from src breaks NUR eval with
+  # restrict-eval because the source store path isn't available at eval time.
+  version = "2026.8.18";
 in
 stdenv.mkDerivation {
   pname = "odysseus";
diff --git a/pkgs/odysseus/version.nix b/pkgs/odysseus/version.nix
index 1de55b0..f00d79a 100644
--- a/pkgs/odysseus/version.nix
+++ b/pkgs/odysseus/version.nix
@@ -3,29 +3,18 @@
 # The single source of truth for the version is APP_VERSION in
 # src/constants.py (the value the app serves at /version). This parses it so
 # the Nix package version can't drift from the app's reported version.
-#
-# Falls back to hardcoded version if source is not available (e.g., NUR eval
-# with restrict-eval, or when the source hasn't been fetched yet).
 { src }:
 let
-  # Hardcoded fallback version - update this when the package updates
-  fallbackVersion = "2026.8.18";
-
-  versionFromSourceResult = builtins.tryEval (
-    let
-      constantsContent = builtins.readFile (src + "/src/constants.py");
-      versionLine = builtins.head (
-        builtins.filter (line: builtins.match "APP_VERSION[[:space:]]*=.*" line != null) (
-          builtins.filter (line: line != "") (
-            builtins.filter (l: builtins.typeOf l == "string") (builtins.split "\n" constantsContent)
-          )
-        )
-      );
-    in
-    builtins.head (
-      builtins.match ''APP_VERSION[[:space:]]*=[[:space:]]*"([^"]+)".*'' versionLine
+  constantsContent = builtins.readFile (src + "/src/constants.py");
+  versionLine = builtins.head (
+    builtins.filter (line: builtins.match "APP_VERSION[[:space:]]*=.*" line != null) (
+      builtins.filter (line: line != "") (
+        builtins.filter (l: builtins.typeOf l == "string") (builtins.split "\n" constantsContent)
+      )
     )
   );
+  version = builtins.head (
+    builtins.match ''APP_VERSION[[:space:]]*=[[:space:]]*"([^"]+)".*'' versionLine
+  );
 in
-# Use version from source if available, otherwise fall back to hardcoded
-if versionFromSourceResult.success then versionFromSourceResult.value else fallbackVersion
+version