diff --git a/pkgs/os-specific/linux/zfs/default.nix b/pkgs/os-specific/linux/zfs/default.nix
index e4c6faa94749..d5090649f7b0 100644
--- a/pkgs/os-specific/linux/zfs/default.nix
+++ b/pkgs/os-specific/linux/zfs/default.nix
@@ -196,6 +196,7 @@ let
         license = licenses.cddl;
         platforms = platforms.linux;
         maintainers = with maintainers; [ hmenke jcumming jonringer wizeman fpletz globin mic92 ];
+        mainProgram = "zfs";
         # If your Linux kernel version is not yet supported by zfs, try zfsUnstable.
         # On NixOS set the option boot.zfs.enableUnstable.
         broken = buildKernel && (kernelCompatible != null) && !kernelCompatible;