diff --git a/10.0/apache/Dockerfile b/10.0/apache/Dockerfile
index d3fea7b..ff00d15 100644
--- a/10.0/apache/Dockerfile
+++ b/10.0/apache/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/10.0/fpm/Dockerfile b/10.0/fpm/Dockerfile
index b123234..1206213 100644
--- a/10.0/fpm/Dockerfile
+++ b/10.0/fpm/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/9.0/apache/Dockerfile b/9.0/apache/Dockerfile
index 1bc85c8..0d29f90 100644
--- a/9.0/apache/Dockerfile
+++ b/9.0/apache/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/9.0/fpm/Dockerfile b/9.0/fpm/Dockerfile
index 6996b28..5c27a0a 100644
--- a/9.0/fpm/Dockerfile
+++ b/9.0/fpm/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/9.1/apache/Dockerfile b/9.1/apache/Dockerfile
index a41d3fb..0adfcf6 100644
--- a/9.1/apache/Dockerfile
+++ b/9.1/apache/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/9.1/fpm/Dockerfile b/9.1/fpm/Dockerfile
index 1b4ffec..118acca 100644
--- a/9.1/fpm/Dockerfile
+++ b/9.1/fpm/Dockerfile
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/Dockerfile.template b/Dockerfile.template
index 78c37ed..1782786 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -18,9 +18,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 # https://doc.owncloud.org/server/8.1/admin_manual/installation/source_installation.html#prerequisites
-RUN docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-	&& docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
-	&& docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
+RUN set -ex; \
+	docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr; \
+	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
+	docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch"; \
+	docker-php-ext-install exif gd intl ldap mbstring mcrypt opcache pdo pdo_mysql pdo_pgsql pgsql zip
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index 0e6811b..b0068af 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -37,6 +37,22 @@ dirCommit() {
 	)
 }
 
+getArches() {
+	local repo="$1"; shift
+	local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
+
+	eval "declare -g -A parentRepoToArches=( $(
+		find -name 'Dockerfile' -exec awk '
+				toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
+					print "'"$officialImagesUrl"'" $2
+				}
+			' '{}' + \
+			| sort -u \
+			| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
+	) )"
+}
+getArches 'owncloud'
+
 cat <<-EOH
 # this file is generated via https://github.com/docker-library/owncloud/blob/$(fileCommit "$self")/$self
 
@@ -75,9 +91,13 @@ for version in "${versions[@]}"; do
 			variantAliases+=( "${versionAliases[@]}" )
 		fi
 
+		variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$version/$variant/Dockerfile")"
+		variantArches="${parentRepoToArches[$variantParent]}"
+
 		echo
 		cat <<-EOE
 			Tags: $(join ', ' "${variantAliases[@]}")
+			Architectures: $(join ', ' $variantArches)
 			GitCommit: $commit
 			Directory: $version/$variant
 		EOE