Issue when installing

[estevezdo]

I get an error when attempting to install:

install_github("GreshamLab/labtools", build_vignettes = TRUE)
Downloading GitHub repo GreshamLab/labtools@HEAD
── R CMD build ──────────────────────────────────────────────────────────────────
✔ checking for file ‘/private/var/folders/zq/1kvs8by16clb0qlx40v2hvsc0000gn/T/Rtmp7kzPfj/remotes84ac7158e40f/GreshamLab-labtools-5e2d05e/DESCRIPTION’ ...
─ preparing ‘labtools’:
✔ checking DESCRIPTION meta-information
─ installing the package to build vignettes
-----------------------------------
─ installing source package ‘labtools’ ...
** using staged installation
** R
** data
*** moving datasets to lazyload DB
** inst
** byte-compile and prepare package for lazy loading
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
there is no package called ‘igraph’
Calls: ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
ERROR: lazy loading failed for package ‘labtools’
─ removing ‘/private/var/folders/zq/1kvs8by16clb0qlx40v2hvsc0000gn/T/RtmplQw3z5/Rinst850d289d19d9/labtools’
-----------------------------------
ERROR: package installation failed
Error: Failed to install 'labtools' from GitHub:
! System command 'R' failed