diff --git a/flake.nix b/flake.nix
index d7b35a1..f8c8c2a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,6 +28,7 @@
           modules = [
             (import ./hosts/rowhammer/configuration.nix)
             agenix.nixosModules.default
+            (import ./hosts/common/build-info.nix { inherit self; })
           ];
         };
         vesuvius = nixpkgs.lib.nixosSystem {
@@ -35,6 +36,7 @@
           modules = [
             (import ./hosts/vesuvius/configuration.nix)
             agenix.nixosModules.default
+            (import ./hosts/common/build-info.nix { inherit self; })
           ];
         };
         zerocool = nixpkgs.lib.nixosSystem {
@@ -42,6 +44,7 @@
           modules = [
             (import ./hosts/zerocool/configuration.nix)
             agenix.nixosModules.default
+            (import ./hosts/common/build-info.nix { inherit self; })
           ];
         };
       };
diff --git a/hosts/common/build-info.nix b/hosts/common/build-info.nix
new file mode 100644
index 0000000..1c959f8
--- /dev/null
+++ b/hosts/common/build-info.nix
@@ -0,0 +1,5 @@
+{ self }:
+{ ... }:
+{
+    system.nixos.variantName = if (self ? rev) then self.rev else self.dirtyRev;
+}