Use rust 1.46

docker/Dockerfile

@@ -5,9 +5,11 @@ RUN apt update
 RUN apt install -y build-essential mingw-w64 gcc-aarch64-linux-gnu gcc-arm-linux-gnueabihf curl vim wget
 
 # Get Rust
-RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
+RUN curl https://sh.rustup.rs -sSf | bash -s -- --default-toolchain none -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 
+RUN rustup toolchain install 1.46.0
+
 RUN rustup target add x86_64-pc-windows-gnu
 RUN rustup target add aarch64-unknown-linux-gnu
 RUN rustup target add armv7-unknown-linux-gnueabihf
@@ -26,9 +28,6 @@ ENV CC_x86_64_unknown_linux_musl="gcc"
 ENV CC_aarch64_unknown_linux_gnu="aarch64-linux-gnu-gcc" 
 ENV CC_armv7_unknown_linux_gnueabhihf="arm-linux-gnueabihf-gcc"
 
-# This is a bug fix for the windows cross compiler for Rust.
-RUN cp /usr/x86_64-w64-mingw32/lib/crt2.o /root/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/lib/crt2.o
-
 # For windows cross compilation, use a pre-build binary. Remember to set the
 # SODIUM_LIB_DIR for windows cross compilation
 RUN cd /opt && wget https://download.libsodium.org/libsodium/releases/libsodium-1.0.17-mingw.tar.gz && \
@@ -41,3 +40,6 @@ RUN cd /tmp && git clone https://github.com/adityapk00/zecwallet-light-cli.git &
     cd zecwallet-light-cli && \
     cargo fetch && \
     cd /tmp && rm -rf zecwallet-light-cli
+
+# This is a bug fix for the windows cross compiler for Rust.
+RUN cp /usr/x86_64-w64-mingw32/lib/crt2.o  /root/.rustup/toolchains/1.46.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-pc-windows-gnu/crt2.o