Installing Software

Installing Software

Rule: prefer cluster modules for system software, uv/renv for language packages, and static binaries in ~/.local/bin for user tools.

Modules first

module avail
module spider git
module spider r
module spider cuda
module load git
module load r

Important: Git may require module load git. Do not assume it is in the default PATH.

For Python projects, prefer uv and a project .venv over loading a generic Python module. Use the Python module only when you specifically need cluster-provided Python or a module-provided package.

In reusable shell scripts and Slurm scripts, load required modules explicitly rather than relying on your interactive shell state:

module purge
module load git
module load r

User binaries

Put user-installed command-line tools here:

mkdir -p ~/.local/bin ~/go/bin
export PATH="$HOME/.local/bin:$HOME/go/bin:$PATH"

Prefer statically-linked builds from GitHub releases if available. Inspect "curl to sh" install patterns prior to using those. Common per-user tools:

• uv — Python project manager (install snippet below).
• duckdb — CLI for SQL over Parquet/CSV/JSON; not module-loadable on the cluster. See [accelerating Python](../accelerating-python/SKILL.md#installing-the-cli-tools).
• qsv — fast CSV triage; not module-loadable. Same place.
• gh — GitHub CLI.
• jq — JSON on the command line.
• ripgrep — fast recursive grep.
• croc, rclone — file transfer (see [using the filesystem](../using-the-filesystem/SKILL.md#moving-files)).

Prefer static or musl binaries

If a GitHub release offers a Linux musl build, prefer it:

x86_64-unknown-linux-musl
x86_64-musl
static-linux-amd64

Why: modern prebuilt binaries often require a newer glibc than the cluster provides. Static/musl builds avoid many GLIBC_2.xx not found errors.

Typical failure:

./tool: /lib64/libc.so.6: version `GLIBC_2.38' not found

Fix: download a musl/static build, use a module, build in Apptainer, or compile on the cluster.

Install uv

Install uv once into your user tools directory:

mkdir -p ~/.local/bin
curl -LsSf https://astral.sh/uv/install.sh | sh
export PATH="$HOME/.local/bin:$PATH"
uv --version

Then use it per project:

cd /gpfs/project/myproject/code
uv init --app
uv add polars pyarrow duckdb
uv sync

GitHub CLI

module load git
gh auth login
gh repo clone owner/repo

If SSH auth fails, see [connecting securely](../connecting-securely/SKILL.md).

When to use Apptainer

Apptainer is not in the default PATH. Load the module first, and run pulls inside a Slurm job (a pull is compute + network) — point the cache and tmp dirs at scratch so a large image doesn't fill your home directory:

export APPTAINER_CACHEDIR=/gpfs/scratch60/$USER/.apptainer/cache
export APPTAINER_TMPDIR=/gpfs/scratch60/$USER/.apptainer/tmp
mkdir -p "$APPTAINER_CACHEDIR" "$APPTAINER_TMPDIR"
module load apptainer
apptainer pull docker://alpine:3.20
apptainer exec alpine_3.20.sif cat /etc/os-release   # runs as you, no root

(On compute nodes an older system Apptainer may shadow the module — check apptainer --version inside the job if you need a specific version.)

Use Apptainer when:

• binaries need incompatible system libraries
• software has complex C/CUDA dependencies
• you need reproducibility beyond Python/R lockfiles
• a Docker image already exists

For Python: use uv

System Python, pip install --user, and conda environments all leak state between projects, slow down GPFS, or both. uv is the way.

cd /gpfs/project/myproject/code
uv add polars pyarrow duckdb
uv sync --frozen

uv add + uv sync --frozen at setup time on a login node. Then jobs run srun .venv/bin/python .... Never pip install --user, never conda create -n job_$SLURM_JOB_ID, never pip install inside a Slurm array. Commit pyproject.toml and uv.lock.

XDG directories

Keep caches out of crowded home directories when possible:

export XDG_CACHE_HOME="/gpfs/scratch60/$USER/.cache"
export XDG_CONFIG_HOME="$HOME/.config"
export XDG_DATA_HOME="$HOME/.local/share"

Create them:

mkdir -p "$XDG_CACHE_HOME" "$XDG_CONFIG_HOME" "$XDG_DATA_HOME" ~/.local/bin

Checklist

• [ ] Try module spider / module load first.
• [ ] User binaries go in ~/.local/bin or ~/go/bin.
• [ ] ~/.local/bin is before system paths in PATH.
• [ ] Caches use XDG_CACHE_HOME when heavy.
• [ ] Static/musl binaries are preferred for standalone tools.
• [ ] No sudo, no credentials in install scripts, no per-job environments.

Further reading

• uv documentation — uv init, uv add, uv run, lockfile and Python interpreter management.
• Lmod user guide — module spider, dependency hierarchy, module purge.
• Apptainer user guide — building, pulling, running containers without root.
• XDG Base Directory spec — XDG_CACHE_HOME/XDG_CONFIG_HOME/XDG_DATA_HOME.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: yale-som-hpc
• Source: yale-som-hpc/claude-code-marketplace
• License: Unlicense

Install and usage instructions live in the source repository linked above.