diff --git a/Dockerfile b/Dockerfile
index e30fbab..77c10c6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,9 @@ RUN apt install -y g++-mingw-w64-x86-64 \
 
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 
+ENV CARGO_BIN=$HOME/.cargo/bin
+ENV PATH=$CARGO_BIN:$PATH
+
 ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc \
 	CC_armv7_unknown_Linux_gnueabihf=arm-linux-gnueabihf-gcc \
 	CXX_armv7_unknown_linux_gnueabihf=arm-linux-gnueabihf-g++
@@ -18,18 +21,10 @@ ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc \
 	CC_aarch64_unknown_linux_gnu=aarch64-linux-gnu-gcc \
 	CXX_aarch64_unknown_linux_gnu=aarch64-linux-gnu-g++
 
-RUN $HOME/.cargo/bin/rustup target add x86_64-pc-windows-gnu
-RUN $HOME/.cargo/bin/rustup toolchain install stable-x86_64-pc-windows-gnu
-
-RUN $HOME/.cargo/bin/rustup target add x86_64-unknown-linux-gnu
-RUN $HOME/.cargo/bin/rustup toolchain install stable-x86_64-unknown-linux-gnu
-
-RUN $HOME/.cargo/bin/rustup target add armv7-unknown-linux-gnueabihf
-RUN $HOME/.cargo/bin/rustup toolchain install stable-armv7-unknown-linux-gnueabihf
-
-RUN $HOME/.cargo/bin/rustup target add aarch64-unknown-linux-gnu
-RUN $HOME/.cargo/bin/rustup toolchain install stable-aarch64-unknown-linux-gnu
-
-RUN $HOME/.cargo/bin/rustup target add wasm32-unknown-unknown
-RUN $HOME/.cargo/bin/rustup toolchain install stable-wasm32-unknown-unknown
+RUN $CARGO_BIN/rustup toolchain install stable-x86_64-unknown-linux-gnu
 
+RUN $CARGO_BIN/rustup target add x86_64-pc-windows-gnu
+RUN $CARGO_BIN/rustup target add x86_64-unknown-linux-gnu
+RUN $CARGO_BIN/rustup target add armv7-unknown-linux-gnueabihf
+RUN $CARGO_BIN/rustup target add aarch64-unknown-linux-gnu
+RUN $CARGO_BIN/rustup target add wasm32-unknown-unknown