TCL/TK support in R 4.1.1

I would like to have TLC/TK support in R 4.1.1 (on a Linux Ubuntu machine). What additional packages shall I install ?

 > capabilities()
           jpeg         png        tiff       tcltk         X11        aqua 
           TRUE        TRUE        TRUE       FALSE        TRUE       FALSE 
       http/ftp     sockets      libxml        fifo      cledit       iconv 
           TRUE        TRUE        TRUE        TRUE        TRUE        TRUE 
            NLS     profmem       cairo         ICU long.double     libcurl 
           TRUE       FALSE        TRUE        TRUE        TRUE        TRUE
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