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László Kupcsik

PROFILE

László Kupcsik

Koopa C. worked across multiple nixpkgs repositories to enhance build reliability and package management for open-source tooling. In GaloisInc/nixpkgs, Koopa resolved a complex build failure in the ChemmineOB R package by aligning dependencies and patching C++ source code, ensuring successful compilation and reproducibility. For srid/nixpkgs, Koopa upgraded the Invidious package and its core dependencies, improving stability and security through timely dependency updates. In Saghen/nixpkgs, Koopa initialized the air-formatter package, updating Rust’s Cargo.lock and establishing a reproducible build process. Throughout, Koopa applied expertise in Nix, Rust, and build systems to deliver maintainable, cross-language solutions.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

3Total
Bugs
1
Commits
3
Features
2
Lines of code
179
Activity Months3

Work History

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 performance summary for Saghen/nixpkgs focused on delivering a robust initial setup for the air-formatter integration, with improvements to dependency management and build reproducibility.

November 2024

1 Commits • 1 Features

Nov 1, 2024

Nov 2024 monthly summary for srid/nixpkgs focusing on maintenance and security-driven improvements. Key feature delivered: dependency upgrades for stability and security by updating Invidious to 2.20241110.0 and upgrading core dependencies (backtracer, crystal-db, crystal-pg) to their latest stable versions. The change is tracked in a single, identifiable commit.

October 2024

1 Commits

Oct 1, 2024

In October 2024, delivered a critical build fix for the ChemmineOB R package within the nixpkgs workflow. By aligning dependencies and patching the C++ source to use the correct OpenBabel version and resolve a pointer-name issue, the package now compiles successfully in the nixpkgs environment. This work enhances stability and reproducibility for downstream R chemistry tooling, reduces installation friction for users, and strengthens the reliability of the nixpkgs packaging stack.

Activity

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Quality Metrics

Correctness86.6%
Maintainability86.6%
Architecture80.0%
Performance73.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

NixRust

Technical Skills

Build System ConfigurationBuild SystemsDependency UpdatesPackage ManagementRust Development

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

GaloisInc/nixpkgs

Oct 2024 Oct 2024
1 Month active

Languages Used

Nix

Technical Skills

Build System ConfigurationPackage Management

srid/nixpkgs

Nov 2024 Nov 2024
1 Month active

Languages Used

Nix

Technical Skills

Dependency UpdatesPackage Management

Saghen/nixpkgs

Feb 2025 Feb 2025
1 Month active

Languages Used

NixRust

Technical Skills

Build SystemsPackage ManagementRust Development

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