diff --git a/docker/Dockerfile.cargo b/docker/Dockerfile.cargo
index f711b431..1af8ead3 100644
--- a/docker/Dockerfile.cargo
+++ b/docker/Dockerfile.cargo
@@ -59,9 +59,9 @@ ENV CARGO_TARGET_DIR="${CARGO_TARGET_DIR}"
 ENV targ_dir="${CARGO_TARGET_DIR}/${cargo_target_profile}"
 ENV targ_targ_dir="${CARGO_TARGET_DIR}/${rust_target}/${cargo_target_profile}"
 RUN \
---mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared,ro \
+--mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared \
 --mount=type=cache,dst=${targ_dir}/deps,id=${cargo_target_share}/deps,sharing=locked \
 --mount=type=cache,dst=${targ_dir}/build,id=${cargo_target_share}/build,sharing=locked \
 --mount=type=cache,dst=${targ_dir}/examples,id=${cargo_target_share}/examples,sharing=locked \
diff --git a/docker/Dockerfile.cargo.audit b/docker/Dockerfile.cargo.audit
index 618b43f8..6f70f7fd 100644
--- a/docker/Dockerfile.cargo.audit
+++ b/docker/Dockerfile.cargo.audit
@@ -12,9 +12,9 @@ COPY --link --from=input . .
 
 WORKDIR /usr/src/tuwunel
 RUN \
---mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared,ro \
+--mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared \
 <<EOF
     set -eux
     rustup run ${rust_toolchain} \
diff --git a/docker/Dockerfile.cargo.fmt b/docker/Dockerfile.cargo.fmt
index 36c64f33..24d5f215 100644
--- a/docker/Dockerfile.cargo.fmt
+++ b/docker/Dockerfile.cargo.fmt
@@ -12,9 +12,9 @@ COPY --link --from=input . .
 
 WORKDIR /usr/src/tuwunel
 RUN \
---mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared,ro \
+--mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared \
 <<EOF
     set -eux
     rustup run ${rust_toolchain} \
diff --git a/docker/Dockerfile.cargo.lychee b/docker/Dockerfile.cargo.lychee
index 3e8368c9..85df47e2 100644
--- a/docker/Dockerfile.cargo.lychee
+++ b/docker/Dockerfile.cargo.lychee
@@ -16,9 +16,9 @@ COPY --link --from=input . .
 
 WORKDIR /usr/src/
 RUN \
---mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared,ro \
+--mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared \
 --mount=type=cache,dst=lychee,sharing=locked \
 <<EOF
     set -eux
diff --git a/docker/Dockerfile.cargo.typos b/docker/Dockerfile.cargo.typos
index f4011fd2..0414463c 100644
--- a/docker/Dockerfile.cargo.typos
+++ b/docker/Dockerfile.cargo.typos
@@ -11,9 +11,9 @@ COPY --link --from=input . .
 
 WORKDIR /usr/src/tuwunel
 RUN \
---mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared,ro \
---mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared,ro \
+--mount=type=cache,dst=${RUSTUP_HOME}/downloads,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/registry,sharing=shared \
+--mount=type=cache,dst=${CARGO_HOME}/git,sharing=shared \
 <<EOF
     set -eux
     rustup run ${rust_toolchain} \