diff --git a/default.nix b/default.nix
index e6e3df4..3ef8cf3 100644
--- a/default.nix
+++ b/default.nix
@@ -5,9 +5,17 @@
   installShellFiles,
   ...
 }:
+let
+  cmakeContent = builtins.readFile ./CMakeLists.txt;
+  cmakeLines = lib.splitString "\n" cmakeContent;
+  # Find the line containing set(KE_VERSION "...")
+  versionLine = lib.findFirst (l: builtins.match ".*set\\(KE_VERSION \".+\"\\).*" l != null) (throw "KE_VERSION not found in CMakeLists.txt") cmakeLines;
+  # Extract the version number
+  version = builtins.head (builtins.match ".*set\\(KE_VERSION \"(.+)\"\\).*" versionLine);
+in
 stdenv.mkDerivation {
   pname = "ke";
-  version = "1.5.1";
+  inherit version;
 
   src = lib.cleanSource ./.;