diff --git a/10/alpine/Dockerfile b/10/alpine/Dockerfile
index 8f72372336..6d3a4de9e0 100644
--- a/10/alpine/Dockerfile
+++ b/10/alpine/Dockerfile
@@ -113,11 +113,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& 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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/9.2/alpine/Dockerfile b/9.2/alpine/Dockerfile
index 6c871bc69e..57fc3040cf 100644
--- a/9.2/alpine/Dockerfile
+++ b/9.2/alpine/Dockerfile
@@ -140,11 +140,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/9.3/alpine/Dockerfile b/9.3/alpine/Dockerfile
index efc9bb8ebb..aa9b1d16a1 100644
--- a/9.3/alpine/Dockerfile
+++ b/9.3/alpine/Dockerfile
@@ -140,11 +140,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/9.4/alpine/Dockerfile b/9.4/alpine/Dockerfile
index 1edfb1b90d..b7a4e4d809 100644
--- a/9.4/alpine/Dockerfile
+++ b/9.4/alpine/Dockerfile
@@ -113,11 +113,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/9.5/alpine/Dockerfile b/9.5/alpine/Dockerfile
index 44e28159f1..45f7eb3283 100644
--- a/9.5/alpine/Dockerfile
+++ b/9.5/alpine/Dockerfile
@@ -113,11 +113,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/9.6/alpine/Dockerfile b/9.6/alpine/Dockerfile
index b0951d1521..3c1705f74e 100644
--- a/9.6/alpine/Dockerfile
+++ b/9.6/alpine/Dockerfile
@@ -113,11 +113,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \
diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index a33bddc5de..f539481208 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -115,11 +115,10 @@ RUN set -ex \
 	&& make -C contrib install \
 	\
 	&& runDeps="$( \
-		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 --no-cache --virtual .postgresql-rundeps \
 		$runDeps \