Upstream changes do not require removing source anymore. See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d8131c2965d5ee59bfa4d548641e52a13cbe17c9

BoukeHaarsma23 · BoukeHaarsma23 · commit cc9b432fbe2a · 2023-09-11T20:12:20.000+02:00
diff --git a/linux/PKGBUILD b/linux/PKGBUILD
@@ -167,8 +167,8 @@ _package() {
   ZSTD_CLEVEL=19 _make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
     DEPMOD=/doesnt/exist modules_install  # Suppress depmod
 
-  # remove build and source links
-  rm "$modulesdir"/{source,build}
+  # remove build links
+  rm "$modulesdir"/build
 }
 
 _package-headers() {

Original file line number	Diff line number	Diff line change
`@@ -167,8 +167,8 @@ _package() {`
`167`	`167`	`ZSTD_CLEVEL=19 _make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \`
`168`	`168`	`DEPMOD=/doesnt/exist modules_install # Suppress depmod`
`169`	`169`
`170`		`- # remove build and source links`
`171`		`- rm "$modulesdir"/{source,build}`
	`170`	`+ # remove build links`
	`171`	`+ rm "$modulesdir"/build`
`172`	`172`	`}`
`173`	`173`
`174`	`174`	`_package-headers() {`