The package sybil is a Systems Biology Library for R, implementing algorithms for constraint based analyses of metabolic networks (e.g. flux-balance analysis (FBA), minimization of metabolic adjustment (MOMA), regulatory on/off minimization (ROOM), robustness analysis and flux variability analysis).
For various reasons, sybil is temporarily not available on CRAN anymore. Until then, use the following commands in the R console to install this package:
install.packages("remotes")
remotes::install_github("SysBioChalmers/sybil")If you use sybil in your work, please cite:
Gelius-Dietrich et al. sybil – Efficient constraint-based modelling in R. BMC Syst Biol 7, 125 (2013). doi: 10.1186/1752-0509-7-125
If you're facing any problems, please open an issue or a discussion or join the 
Note: This repository was previously hosted at https://gitlab.cs.uni-duesseldorf.de/general/ccb/sybil.