Rtools is required to build R packages but is not currently installed

[Mephistophiel]

Screenshot

Hi how can i evaluate this problem what should i do the error is:
WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

Using Rtools40 on Windows

Installing package into ‘C:/Users/Mephi/OneDrive/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)

[CALUM_POLWART]

Did you try

install.packages("Rtools")

[andresrcs]

@Mephistophiel

Please download and install the appropriate version of Rtools before proceeding:

cran.rstudio.com

Using Rtools40 on Windows

Simply follow the instructions you are given.

RTools is a separate software that you have to download and install in your system (not in R). The link for the download is in the warning message you are getting.

[Mephistophiel]

i downloaded and installed the rtools and did the necessary process but i have still problem, which is
Sys.which("make")
make
""

when i try to install
install.packages("jsonlite", type = "source")
i got something like that
but when i try to install devtools it seems workd, all the photos are in this printscreen links
its working? i guess or i dont know what should i do i did r4 is writable. and dont know what to do next
there is all the screenshots https://prnt.sc/1033p3j and https://prnt.sc/1033pva

[andresrcs]

Please do not post screenshots, post the actual console output as formatted code, here is how to do it

FAQ: How to format your code

Formatting Code: the Basics All code or console output you include in your posts should be formatted properly. Luckily, this is very easy to do! Just use the code formatting button at the top of the post editing box: [image] Select some code Click the </> button! The code formatting button automatically adds special Markdown formatting symbols to whatever you selected. If you check the preview pane to the right of your post, you'll see that the forum software now outputs nicely formatted code . [04] The code formatting button is pretty smart! It can tell the difference between snippets of code that are part of a sentence and blocks of code that stand alone. …

[Mephistophiel]

https://prnt.sc/1036g2x now i have another problem. what can i do now

[Mephistophiel]

the problem is when i try to update packages

update.packages()
Warning: package 'boot' in library 'C:/Program Files/R/R-4.0.4/library' will not be updated
Warning: package 'cluster' in library 'C:/Program Files/R/R-4.0.4/library' will not be updated
Warning: package 'MASS' in library 'C:/Program Files/R/R-4.0.4/library' will not be updated
Warning: package 'mgcv' in library 'C:/Program Files/R/R-4.0.4/library' will not be updated
what can i do for this and

[nirgrahamuk]

@Mephistophiel

what can i do for this and

Some R packages do not update with update.packages() - Stack Overflow