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+FROM ubuntu:25.04
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+RUN apt-get -y update
+
+# for unity test
+RUN apt-get install -y ruby xxd
+
+# risc-v cross compiler
+RUN apt-get install -y gcc-riscv64-unknown-elf build-essential
+
+# zig
+RUN apt-get install -y curl
+RUN curl https://raw.githubusercontent.com/tristanisham/zvm/master/install.sh | bash
+ENV ZVM_INSTALL /root/.zvm/self
+ENV PATH="$PATH:/root/.zvm/bin:/root/.zvm/self"
+ENV export PATH="$/.zvm/bin"
+RUN zvm i 0.15.2
+
+# rust
+RUN apt-get install -y rustup libclang1
+RUN rustup default stable
+RUN rustup target add riscv32im-unknown-none-elf
+RUN apt-get install -y libclang1