diff --git a/packages.nix b/packages.nix
index 45e1133f..1293aafd 100644
--- a/packages.nix
+++ b/packages.nix
@@ -192,7 +192,7 @@ lib.attrsets.mapAttrs
 
             ${hostConfig.system.build.copyToServer} ${inputPaths} ${declaredRunnerDrvPath}
 
-            ${hostConfig.system.build.runOnServer} bash -e <<END
+            ${hostConfig.system.build.runOnServer} NIXOS_REBUILD=$NIXOS_REBUILD bash -e <<END
             set -eou pipefail
             ${createDirsCopyCurrent name}