diff --git a/copy-builtin b/copy-builtin
index cd6f259092ed..18cc741b58e7 100755
--- a/copy-builtin
+++ b/copy-builtin
@@ -1,74 +1,50 @@
 #!/bin/sh
 
 set -ef
 
 usage()
 {
 	echo "usage: $0 <kernel source tree>" >&2
 	exit 1
 }
 
 [ "$#" -eq 1 ] || usage
 KERNEL_DIR="$1"
 
 if ! [ -e 'zfs_config.h' ]
 then
 	echo "$0: you did not run configure, or you're not in the ZFS source directory."
 	echo "$0: run configure with --with-linux=$KERNEL_DIR and --enable-linux-builtin."
 
 	exit 1
 fi >&2
 
 make clean ||:
 make gitrev
 
 rm -rf "$KERNEL_DIR/include/zfs" "$KERNEL_DIR/fs/zfs"
 cp -R include "$KERNEL_DIR/include/zfs"
 cp -R module "$KERNEL_DIR/fs/zfs"
 cp zfs_config.h "$KERNEL_DIR/include/zfs/"
 
 cat > "$KERNEL_DIR/fs/zfs/Kconfig" <<EOF
 config ZFS
 	tristate "ZFS filesystem support"
 	depends on EFI_PARTITION
 	select ZLIB_INFLATE
 	select ZLIB_DEFLATE
 	help
 	  This is the ZFS filesystem from the OpenZFS project.
 
 	  See https://github.com/openzfs/zfs
 
 	  To compile this file system support as a module, choose M here.
 
 	  If unsure, say N.
 EOF
 
-add_after()
-{
-	FILE="$1"
-	MARKER="$2"
-	NEW="$3"
-
-	while IFS='' read -r LINE
-	do
-		printf "%s\n" "$LINE"
-
-		if [ -n "$MARKER" ] && [ "$LINE" = "$MARKER" ]
-		then
-			printf "%s\n" "$NEW"
-			MARKER=''
-			if IFS='' read -r LINE
-			then
-				[ "$LINE" != "$NEW" ] && printf "%s\n" "$LINE"
-			fi
-		fi
-	done < "$FILE" > "$FILE.new"
-
-	mv "$FILE.new" "$FILE"
-}
-
-add_after "$KERNEL_DIR/fs/Kconfig" 'if BLOCK' 'source "fs/zfs/Kconfig"'
-add_after "$KERNEL_DIR/fs/Makefile" 'endif' 'obj-$(CONFIG_ZFS) += zfs/'
+sed -i '/source "fs\/ext2\/Kconfig\"/i\source "fs/zfs/Kconfig"' "$KERNEL_DIR/fs/Kconfig"
+echo 'obj-$(CONFIG_ZFS) += zfs/' >> "$KERNEL_DIR/fs/Makefile"
 
 echo "$0: done. now you can build the kernel with ZFS support." >&2
 echo "$0: make sure you enable ZFS support (CONFIG_ZFS) before building." >&2