diff --git a/ci_container/build.sh b/ci_container/build.sh
index c655a23..002285a 100755
--- a/ci_container/build.sh
+++ b/ci_container/build.sh
@@ -50,7 +50,7 @@ for i in "${images[@]}"; do
 	echo "🔨 Assembling »${IMAGENAME}«"
 	ctr="$(buildah from "$basectr")"
 	buildah run "$ctr" /bin/sh -c 'apt-get update; \
-	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install -y \
+	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install --no-install-recommends -y \
 	    build-essential \
 	    exim4-daemon-heavy \
 	    exim4-dev \
@@ -61,7 +61,7 @@ for i in "${images[@]}"; do
 	    pkg-config \
 	    python3-pip \
 	    libxml2-utils; \
-	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install -y \
+	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install --no-install-recommends -y \
 	    debhelper \
 	    debsigs \
 	    devscripts \
@@ -69,7 +69,7 @@ for i in "${images[@]}"; do
 	    git-buildpackage \
 	    gpgv1 \
 	    meson; \
-	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install -y \
+	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install --no-install-recommends -y \
 	    vim; \
 	rm -rf /var/lib/apt/lists/*;'
 	buildah run "$ctr" /bin/sh -c \