Fix ldd logic for bookworm/usrmerge

Author: tianon

Dockerfile.template

@@ -111,9 +111,9 @@ RUN set -ex; \
 	apt-mark auto '.*' > /dev/null; \
 	apt-mark manual $savedAptMark; \
 	ldd "$extDir"/*.so \
-		| awk '/=>/ { print $3 }' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
 		| sort -u \
-		| xargs -r dpkg-query -S \
+		| xargs -r dpkg-query --search \
 		| cut -d: -f1 \
 		| sort -u \
 		| xargs -rt apt-mark manual; \