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-rw-r--r--pkgs/os-specific/linux/kernel/manual-config.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
index 87fa9c8f08e..d206910732c 100644
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -179,7 +179,7 @@ let
       '' else "") + (if isModular then ''
         mkdir -p $dev
         cp vmlinux $dev/
-        if [ -z "$dontStrip" ]; then
+        if [ -z "''${dontStrip-}" ]; then
           installFlagsArray+=("INSTALL_MOD_STRIP=1")
         fi
         make modules_install $makeFlags "''${makeFlagsArray[@]}" \