diff --git a/flake.nix b/flake.nix
index 78c9dc823..6c5d94861 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,7 @@
       artiqVersionMajor = 7;
       artiqVersionMinor = self.sourceInfo.revCount or 0;
       artiqVersionId = self.sourceInfo.shortRev or "unknown";
-      artiqVersion = (builtins.toString artiqVersionMajor) + "." + (builtins.toString artiqVersionMinor) + "-" + artiqVersionId + "-beta";
+      artiqVersion = (builtins.toString artiqVersionMajor) + "." + (builtins.toString artiqVersionMinor) + "." + artiqVersionId + ".beta";
 
       rustManifest = pkgs.fetchurl {
         url = "https://static.rust-lang.org/dist/2021-01-29/channel-rust-nightly.toml";