Thank you for your answer but it seems that it does not work:
> install.packages("C:\\Users\\anna.pithioud\\Documents\\R\\win-library\\4.1\\adehabitat", repos=NULL, type="source")
Installation du package dans ‘C:/Users/anna.pithioud/Documents/R/win-library/4.1’
(car ‘lib’ n'est pas spécifié)
Avis : invalid package 'C:/Users/anna.pithioud/Documents/R/win-library/4.1/adehabitat'
Erreur : ERREUR : aucun package spécifié
Warning in install.packages :
installation of package ‘C:/Users/anna.pithioud/Documents/R/win-library/4.1/adehabitat’ had non-zero exit status
But maybe I did something wrong 