From 5c80a25653ba38ff86a079ab9cee76477158dd5f Mon Sep 17 00:00:00 2001
From: Damian Szuberski <szuberskidamian@gmail.com>
Date: Thu, 24 Feb 2022 19:33:48 +0100
Subject: [PATCH] Fix directory detection in `dkms.mkconf`

Fix `zfs-dkms` installation on Debian-derived distributions by
aligning the directory detection logic to #13096.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #11449
Closes #13141
---
 scripts/dkms.mkconf | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/scripts/dkms.mkconf b/scripts/dkms.mkconf
index 9d12a8c3b3..408322fa12 100755
--- a/scripts/dkms.mkconf
+++ b/scripts/dkms.mkconf
@@ -29,22 +29,14 @@ PRE_BUILD="configure
   --prefix=/usr
   --with-config=kernel
   --with-linux=\$(
-    case \`lsb_release -is\` in
-      (Debian|Devuan)
-        if [[ -e \${kernel_source_dir/%build/source} ]]
-        then
-          echo \${kernel_source_dir/%build/source}
-        else
-          # A kpkg exception for Proxmox 2.0
-          echo \${kernel_source_dir}
-        fi
-      ;;
-      (*)
-        echo \${kernel_source_dir}
-      ;;
-    esac
+    if [ -e "\${kernel_source_dir/%build/source}" ]
+    then
+      echo "\${kernel_source_dir/%build/source}"
+    else
+      echo "\${kernel_source_dir}"
+    fi
   )
-  --with-linux-obj=\${kernel_source_dir}
+  --with-linux-obj="\${kernel_source_dir}"
   \$(
     [[ -n \"\${ICP_ROOT}\" ]] && \\
     {