diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index b5d4ba9..e58d28f 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -42,11 +42,10 @@ RUN set -x \
 	&& cd / && rm -rf /usr/src/memcached \
 	\
 	&& runDeps="$( \
-		scanelf --needed --nobanner --recursive /usr/local \
-			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
-			| sort -u \
-			| xargs -r apk info --installed \
+		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local \
+			| tr ',' '\n' \
 			| sort -u \
+			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
 	&& apk add --virtual .memcached-rundeps $runDeps \
 	&& apk del .build-deps \