Instalar o ggplot "o pacote 'ggplot' não está disponível" e os erros "subscrito fora dos limites"

$ R
R version 2.12.2 (2011-02-25)
Platform: i486-pc-linux-gnu (32-bit)

> install.packages("ggplot")
Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
  package ‘ggplot’ is not available

> install.packages("ggplot", dep="T")
Error in apply(available[p1, dependencies, drop = FALSE], 1L, function(x) paste(x[!is.na(x)],  : 
  subscript out of bounds
In addition: Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
  package ‘ggplot’ is not available

> install.packages("ggplot", dep="T", type="source")
Error in apply(available[p1, dependencies, drop = FALSE], 1L, function(x) paste(x[!is.na(x)],  : 
  subscript out of bounds
In addition: Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
  package ‘ggplot’ is not available

Como posso instalarggplot?

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