diff --git a/packages/src/Dockerfile.build.deb-systemd b/packages/src/Dockerfile.build.deb-systemd
index 48545a3da..d91318e58 100644
--- a/packages/src/Dockerfile.build.deb-systemd
+++ b/packages/src/Dockerfile.build.deb-systemd
@@ -13,7 +13,7 @@ RUN apt-get update -qq \
   && apt-get install -y -q build-essential curl git ruby ruby-dev
 
 # FPM
-RUN gem install public_suffix -v 4.0.7 && gem install fpm -v 1.14.1
+RUN gem install public_suffix -v 4.0.7 && gem install dotenv -v 2.8.1 && gem install fpm -v 1.14.1
 
 # Golang
 RUN curl -o go.tar.gz -sSL "https://go.dev/dl/go${GOVERSION}.linux-${TARGETARCH}.tar.gz"
diff --git a/packages/src/Dockerfile.build.rpm-systemd b/packages/src/Dockerfile.build.rpm-systemd
index e9e3ee353..3dc2908e6 100644
--- a/packages/src/Dockerfile.build.rpm-systemd
+++ b/packages/src/Dockerfile.build.rpm-systemd
@@ -9,10 +9,12 @@ ENV ROOT_DIR /root
 ENV SOURCE_DIR /source
 
 # Packages required for both building and packaging
-RUN yum install -y centos-release-scl scl-utils tar make git rpmdevtools gcc && yum install -y rh-ruby27 rh-ruby27-ruby-devel
+#
+# This uses Ruby 3.0 since 2.7 (which still used for Debian builds) does not work with fpm: https://github.com/jordansissel/fpm/issues/2048#issuecomment-1972196104
+RUN yum install -y centos-release-scl scl-utils tar make git rpmdevtools gcc && yum install -y rh-ruby30 rh-ruby30-ruby-devel
 
 # FPM
-RUN source scl_source enable rh-ruby27 && gem install fpm -v 1.14.1
+RUN source scl_source enable rh-ruby30 && gem install fpm -v 1.14.1
 
 # Golang
 RUN curl -o go.tar.gz -sSL "https://go.dev/dl/go${GOVERSION}.linux-${TARGETARCH}.tar.gz"