diff --git a/utils/Dockerfile b/utils/Dockerfile
index a3c6d25..3c32698 100644
--- a/utils/Dockerfile
+++ b/utils/Dockerfile
@@ -1,65 +1,145 @@
-ARG PHP_VERSION=8.2
-ARG PYTHON_VERSION=3.11
-ARG RUST_VERSION=1.67.1
-ARG ZIG_VERSION=0.11.0-dev.1606+3c2a43fdc
+# TODO: nim 2.0.0
+ARG GO_VERSION=1.21.1
+ARG NIM_VERSION=1.6.6
+ARG PHP_VERSION=8.2.10
+ARG PYTHON_VERSION=3.11.5
+ARG RUST_VERSION=1.72.0
+ARG ZIG_VERSION=0.11.0
 
-FROM debian:unstable
 
+#######################################################################
+# Foundations
+
+FROM debian:unstable AS base-builder
 # Install foundations-which-rarely-change up-front so we can cache them,
 # and then install language-specific things on top
 USER root
 RUN apt update && apt install -y \
-    build-essential linux-perf valgrind vim git libsdl2-dev wget
+    build-essential linux-perf valgrind vim git mercurial libsdl2-dev wget curl
 
 # Configure developer environment
 ARG USER_ID
 ARG GROUP_ID
-RUN addgroup --gid $GROUP_ID dev || true
-RUN adduser --disabled-password --gecos '' --uid $USER_ID --gid $GROUP_ID dev
+RUN addgroup --gid $GROUP_ID dev || true && \
+    adduser --disabled-password --gecos '' --uid $USER_ID --gid $GROUP_ID dev
 
-# Install C++ tools
-USER root
-RUN apt update && apt install -y cmake clang-format-14 libfmt-dev
 
-# Install Go tools
-USER root
-RUN apt update && apt install -y golang
+#######################################################################
+# Go
 
-# Install Nim tools
-USER root
-RUN apt update && apt install -y nim
+FROM base-builder AS go-builder
+ARG GO_VERSION
 USER dev
-RUN nimble refresh
+RUN wget https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz -O - | tar -xz -C /tmp && \
+    mv /tmp/go /home/dev/.go
+ENV PATH="/home/dev/.go/bin:$PATH"
 
-# Install PHP tools
+
+#######################################################################
+# Nim
+
+FROM base-builder AS nim-builder
+ARG NIM_VERSION
+USER dev
+ENV CHOOSENIM_CHOOSE_VERSION=${NIM_VERSION}
+ENV PATH="/home/dev/.nimble/bin:$PATH"
+RUN curl https://nim-lang.org/choosenim/init.sh -sSf | sh -s -- -y && \
+    nimble refresh
+
+
+#######################################################################
+# PHP
+
+FROM base-builder AS php-builder
 ARG PHP_VERSION
-USER root
-RUN apt update && apt install -y php${PHP_VERSION}-cli php${PHP_VERSION}-dev
+RUN apt-get install -y libxml2-dev libsqlite3-dev libssl-dev autoconf
 USER dev
+RUN wget https://www.php.net/distributions/php-${PHP_VERSION}.tar.gz -O - | tar -xz -C /tmp && \
+    cd /tmp/php-${PHP_VERSION} && ./configure --prefix=/home/dev/.php --with-openssl && make -j install
+ENV PATH="/home/dev/.php/bin:$PATH"
+RUN curl https://getcomposer.org/installer | php -- --quiet --install-dir=/home/dev/.php/bin/ --filename=composer
 RUN git clone https://github.com/Ponup/php-sdl ~/php-sdl && \
-    cd ~/php-sdl && phpize && ./configure && make
+    cd ~/php-sdl && phpize && ./configure && make -j
 
-# Install Python tools
+
+#######################################################################
+# Python
+
+FROM base-builder AS py-builder
 ARG PYTHON_VERSION
 USER root
-RUN apt update && apt install -y python${PYTHON_VERSION} python${PYTHON_VERSION}-venv python${PYTHON_VERSION}-dev black
-RUN mkdir -p /home/dev/.local/bin && ln -s /usr/bin/python${PYTHON_VERSION} /home/dev/.local/bin/python3
-ENV PATH="/home/dev/.local/bin:$PATH"
+RUN apt-get install -y --no-install-recommends \
+    make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev \
+    libsqlite3-dev wget curl llvm libncurses5-dev xz-utils tk-dev \
+    libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev && \
+    apt-get install -y mecab-ipadic-utf8
+USER dev
+ENV PYENV_ROOT="/home/dev/.pyenv"
+ENV PATH="/home/dev/.pyenv/shims:/home/dev/.pyenv/bin:$PATH"
+RUN git clone --depth=1 https://github.com/yyuu/pyenv /home/dev/.pyenv && \
+    pyenv install ${PYTHON_VERSION} && \
+    pyenv global ${PYTHON_VERSION} && \
+    pyenv rehash
 
-# Install Rust tools
+
+#######################################################################
+# Rust
+
+FROM base-builder AS rs-builder
 ARG RUST_VERSION
 USER dev
-RUN wget -qO - https://sh.rustup.rs | sh -s -- --default-toolchain ${RUST_VERSION} -y
 ENV PATH="/home/dev/.cargo/bin:$PATH"
-RUN cargo search foo
+RUN wget -qO - https://sh.rustup.rs | sh -s -- --default-toolchain ${RUST_VERSION} -y && \
+    cargo search foo
 
-# Install Zig tools
+
+#######################################################################
+# Zig
+
+FROM base-builder AS zig-builder
 ARG ZIG_VERSION
 USER dev
-
-# RUN wget https://ziglang.org/download/${ZIG_VERSION}/zig-linux-$(uname -m)-${ZIG_VERSION}.tar.xz -O /tmp/zig.tar.xz && \
 RUN wget https://ziglang.org/builds/zig-linux-$(uname -m)-${ZIG_VERSION}.tar.xz -O /tmp/zig.tar.xz && \
     mkdir ~/.zig && tar --strip-components=1 -C ~/.zig -xf /tmp/zig.tar.xz && rm -f /tmp/zig.tar.gz
+
+
+#######################################################################
+# Final image
+
+FROM base-builder AS final
+
+ARG USER_ID
+ARG GROUP_ID
+
+# Install C/C++ tools
+USER root
+RUN apt update && apt install -y cmake clang clang-format-14 libfmt-dev
+
+# Install Go tools
+COPY --from=go-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.go /home/dev/.go
+ENV PATH="/home/dev/.go/bin:$PATH"
+
+# Install Nim tools
+COPY --from=nim-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.choosenim /home/dev/.choosenim
+COPY --from=nim-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.nimble /home/dev/.nimble
+ENV PATH="/home/dev/.nimble/bin:$PATH"
+
+# Install PHP tools
+COPY --from=php-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.php /home/dev/.php
+ENV PATH="/home/dev/.php/bin:$PATH"
+
+# Install Python tools
+COPY --from=py-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.pyenv /home/dev/.pyenv
+ENV PYENV_ROOT="/home/dev/.pyenv"
+ENV PATH="/home/dev/.pyenv/shims:/home/dev/.pyenv/bin:$PATH"
+
+# Install Rust tools
+COPY --from=rs-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.rustup /home/dev/.rustup
+COPY --from=rs-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.cargo /home/dev/.cargo
+ENV PATH="/home/dev/.cargo/bin:$PATH"
+
+# Install Zig tools
+COPY --from=zig-builder --chown=${USER_ID}:${GROUP_ID} /home/dev/.zig /home/dev/.zig
 ENV PATH="/home/dev/.zig:$PATH"
 
 # Get ready to go