diff --git a/osdk/tools/docker/Dockerfile b/osdk/tools/docker/Dockerfile
index b49bab125..f0233014c 100644
--- a/osdk/tools/docker/Dockerfile
+++ b/osdk/tools/docker/Dockerfile
@@ -145,6 +145,12 @@ RUN curl https://sh.rustup.rs -sSf | \
     && cargo -V \
     && rustup component add rust-src rustc-dev llvm-tools-preview
 
+# Let Github runners reuse the Rust toolchain installed in the Dockerfile and
+# also the Cargo crates downloaded subsequently in the Docker build process.
+RUN mkdir -p /github/home \
+    && ln -s /root/.cargo /github/home/.cargo \
+    && ln -s /root/.rustup /github/home/.rustup
+
 # Install cargo tools
 RUN cargo install \
     cargo-binutils \
diff --git a/tools/docker/nix/Dockerfile b/tools/docker/nix/Dockerfile
index a2236353e..2c231c33c 100644
--- a/tools/docker/nix/Dockerfile
+++ b/tools/docker/nix/Dockerfile
@@ -39,6 +39,10 @@ RUN make general_pkgs VERBOSE=0 \
 # Clean source files
 RUN rm -rf /root/test
 
+# Let Github runners reuse Nixpkgs tarball installed in the Dockerfile.
+RUN mkdir -p /github/home/.cache \
+    && ln -s /root/.cache/nix /github/home/.cache/nix
+
 VOLUME [ "/root/asterinas" ]
 
 WORKDIR /root/asterinas