diff --git a/artiq/_version.py b/artiq/_version.py
index e308ce8c2..bf9797c9d 100644
--- a/artiq/_version.py
+++ b/artiq/_version.py
@@ -1,4 +1,4 @@
 import os
 
 def get_version():
-    return os.getenv("VERSIONEER_OVERRIDE", default="8.0.beta")
+    return os.getenv("VERSIONEER_OVERRIDE", default="8.0+unknown.beta")
diff --git a/flake.nix b/flake.nix
index 1336351bb..2d9a03c12 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,7 @@
       artiqVersionMajor = 8;
       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";
       artiqRev = self.sourceInfo.rev or "unknown";
 
       rustManifest = pkgs.fetchurl {
diff --git a/versioneer.py b/versioneer.py
index f6393d21e..dcb8bf1b2 100644
--- a/versioneer.py
+++ b/versioneer.py
@@ -11,7 +11,7 @@ def get_rev():
 """
 
 def get_version():
-    return os.getenv("VERSIONEER_OVERRIDE", default="8.0.beta")
+    return os.getenv("VERSIONEER_OVERRIDE", default="8.0+unknown.beta")
 
 def get_rev():
     return os.getenv("VERSIONEER_REV", default="unknown")