Nixtat

Nixtat is a script for quick and simple nix store space occupation analysis. It scans your /nix/store (or any specified path), aggregates package sizes by name (with or without versions), and displays a sorted, human-readable table of the results.

Demo

Features

• Smart Aggregation: Automatically groups packages by name (e.g., python3-3.10 and python3-3.11 are grouped under python3 unless configured otherwise).
• Rich Output: Uses the rich library for beautiful terminal tables, progress bars, and color coding.
• Flexible Sorting: Sort by total size, occurrence count, or package name.
• Filtering: Automatically ignores .drv manifests and non-directory files.
• Custom Paths: Can analyze alternative store locations.
• Script Friendly: Includes a --simplify mode for machine-readable output.

Installation & Usage

Using Nix Flakes

Directly from the repository:

nix run github:jrodez/nixtat

or in a nix flake:

inputs.nixtat.url = "github:jrodez/nixtat";

Using Nix (Legacy)

nix-build && ./result/bin/nixtat.py

Options

Option	Description
-H, --human-readable	Default. Display sizes in human-readable format with headers and progress bar.
--simplify	Disable rich output. Use simple text format (name size count % %cumul).
--with-version	Keep version numbers in package names (e.g., go-1.20 instead of go).
--sort {size,count,name}	Column to sort by. Default is size.
-r, --reverse	Reverse the sort order.
-n N	Limit output to N lines.
--full	Display all lines (disables auto-truncation based on terminal height).
--path PATH	Path to the nix store (default: /nix/store).
-v, --verbose	Display errors (like permission denied) as they occur.

Examples

View top disk consumers:

nixtat.py

View top consumers keeping versions distinct:

nixtat.py --with-version

Sort by number of store paths (occurrences):

nixtat.py --sort count