Trying to install MetaboAnalystR using following command:
devtools::install_github("xia-lab/MetaboAnalystR", build = TRUE, build_vignettes = FALSE)
but it fails probably because "mzR has been built against a different Rcpp version"?
> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19041)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    
attached base packages:
[1] stats     graphics  grDevices utils     datasets 
[6] methods   base     
loaded via a namespace (and not attached):
 [1] pillar_1.4.6        compiler_4.0.2     
 [3] RColorBrewer_1.1-2  BiocManager_1.30.10
 [5] remotes_2.2.0       prettyunits_1.1.1  
 [7] tools_4.0.2         testthat_2.3.2     
 [9] pkgload_1.1.0       digest_0.6.25      
[11] pkgbuild_1.1.0      memoise_1.1.0      
[13] lifecycle_0.2.0     tibble_3.0.3       
[15] gtable_0.3.0        pkgconfig_2.0.3    
[17] rlang_0.4.7         cli_2.0.2          
[19] rstudioapi_0.11     curl_4.3           
[21] withr_2.3.0         dplyr_1.0.2        
[23] httr_1.4.2          desc_1.2.0         
[25] generics_0.0.2      fs_1.5.0           
[27] vctrs_0.3.4         devtools_2.3.2     
[29] rprojroot_1.3-2     grid_4.0.2         
[31] tidyselect_1.1.0    glue_1.4.2         
[33] R6_2.4.1            processx_3.4.4     
[35] fansi_0.4.1         pacman_0.5.1       
[37] sessioninfo_1.1.1   pheatmap_1.0.12    
[39] ggplot2_3.3.2       purrr_0.3.4        
[41] callr_3.4.4         magrittr_1.5       
[43] backports_1.1.10    scales_1.1.1       
[45] ps_1.3.4            matrixStats_0.56.0 
[47] ellipsis_0.3.1      usethis_1.6.3      
[49] assertthat_0.2.1    colorspace_1.4-1   
[51] munsell_0.5.0       crayon_1.3.4      

As Laurent mentioned below you can usually ignore that warning message - only that
install_githubdoes not install packages when there is a warning thrown during installation. To force installing a package even if there are warnings you can setSys.setenv(R_REMOTES_NO_ERRORS_FROM_WARNINGS="true")before callinginstall_github.Generally you should not use this option, but in this case it should be safe.
cheers, jo