diff --git a/dev_scripts/env.py b/dev_scripts/env.py
index f87abd1..7e5c188 100755
--- a/dev_scripts/env.py
+++ b/dev_scripts/env.py
@@ -78,7 +78,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends podman uidmap dh-python make \
-        build-essential fakeroot libqt5gui5 pipx python3 python3-dev \
+        build-essential fakeroot fuse-overlayfs libqt5gui5 pipx python3 python3-dev \
         python3-venv python3-stdeb python3-all \
     && rm -rf /var/lib/apt/lists/*
 # NOTE: `pipx install poetry` fails on Ubuntu Focal, when installed through APT. By
@@ -97,7 +97,7 @@ RUN apt-get update \
 
 # FIXME: Install Poetry on Fedora via package manager.
 DOCKERFILE_BUILD_DEV_FEDORA_DEPS = r"""
-RUN dnf install -y rpm-build podman python3 pipx make qt5-qtbase-gui \
+RUN dnf install -y rpm-build podman python3 python3-setuptools pipx make qt5-qtbase-gui \
     && dnf clean all
 
 # FIXME: Drop this fix after it's resolved upstream.
@@ -143,7 +143,7 @@ RUN cd /home/user/dangerzone && poetry --no-ansi install
 DOCKERFILE_BUILD_DEBIAN_DEPS = r"""
 ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends mupdf \
+    && apt-get install -y --no-install-recommends mupdf fuse-overlayfs \
     && rm -rf /var/lib/apt/lists/*
 """