Building package/DESCRIPTION file not existing?

Hello useRs

I am trying to build a package for personal use and for making easier working with other people but I keep getting the same error message about the DESCRIPTION file not existing.

when trying to install from a source tar.gz file:

Error in .read_description(dfile) :
   file 'C:/Users/Propri?taire/AppData/Local/Temp/RtmpHFMONb/R.INSTALL647a3535/mypkg/DESCRIPTION' does not exist

when trying to build a binary version:

Error in .read_description(dfile) :
   file 'C:/Users/Propri?taire/Documents/RETROBIRD/mypkg/DESCRIPTION' does not exist

In this last case, the DESCRIPTION file is certainly there! Also, help and DESCRIPTION files are edited and my path variable seems to be set correctly as I can access R and tex (form miktex 2.9) from the console. I feel it might be related to language issues (windows on my system is in french, see sessionInfo() at bottom of message) or something about temporary directories, but I really can't find the problem. I've looked into the cygwin warning, but it didn't seemed to be the problem, though I may be wrong.

Any hints? Below is the complete sequence with errors.

Thanks,
Francois Rousseu

setwd("C:/Users/Propri?taire/Documents/RETROBIRD/")
library(devtools)
f<- function(x,y) x+y
d<- data.frame(a=1, b=2)
package.skeleton(list=c("f","d"), name="mypkg")

## editing of help and description files

Creating directories ...
Creating DESCRIPTION ...
Creating Read-and-delete-me ...
Saving functions and data ...
Making help files ...
Done.
Further steps are described in './mypkg/Read-and-delete-me'.

build("C:/Users/Propri?taire/Documents/RETROBIRD/mypkg")

* checking for file 'C:\Users\Propri?taire\Documents\RETROBIRD\mypkg/DESCRIPTION' ... OK
* preparing 'mypkg':
* checking DESCRIPTION meta-information ... OK
* checking for LF line-endings in source and make files
* checking for empty or unneeded directories
* looking to see if a 'data/datalist' file should be added
* building 'mypkg_1.0.tar.gz'
cygwin warning:
   MS-DOS style path detected: C:/Users/Propri\xC3\xA9taire/Documents/RETROBIRD/mypkg_1.0.tar.gz
   Preferred POSIX equivalent is: /cygdrive/c/Users/Propri\xC3\xA9taire/Documents/RETROBIRD/mypkg_1.0.tar.gz
   CYGWIN environment variable option "nodosfilewarning" turns off this warning.
   Consult the user's guide for more details about POSIX paths:
     http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
[1] "C:/Users/Propri?taire/Documents/RETROBIRD/mypkg_1.0.tar.gz"

install.packages(pkgs="mypkg_1.0.tar.gz",lib="C:/Users/Propri?taire/Documents/R/win-library/2.13",repos=NULL,type="source")

* installing *source* package 'mypkg' ...
Error in .read_description(dfile) :
   file 'C:/Users/Propri?taire/AppData/Local/Temp/RtmpHFMONb/R.INSTALL647a3535/mypkg/DESCRIPTION' does not exist
ERROR: installing package DESCRIPTION failed for package 'mypkg'
* removing 'C:/Users/Propri?taire/Documents/R/win-library/2.13/mypkg'
Warning messages:
1: running command 'C:/PROGRA~1/R/R-213~1.0/bin/x64/R CMD INSTALL -l "C:/Users/Propri?taire/Documents/R/win-library/2.13"   "mypkg_1.0.tar.gz"' had status 1
2: In install.packages(pkgs = "mypkg_1.0.tar.gz", lib = "C:/Users/Propri?taire/Documents/R/win-library/2.13",  :
   installation of package 'mypkg_1.0.tar.gz' had non-zero exit status

build("C:/Users/Propri?taire/Documents/RETROBIRD/mypkg",binary=T)

* installing to library 'C:/Users/Propri?taire/Documents/R/win-library/2.13'
* installing *source* package 'mypkg' ...
Error in .read_description(dfile) :
   file 'C:/Users/Propri?taire/Documents/RETROBIRD/mypkg/DESCRIPTION' does not exist
ERROR: installing package DESCRIPTION failed for package 'mypkg'
* removing 'C:/Users/Propri?taire/Documents/R/win-library/2.13/mypkg'
Error: Command failed (1)
In addition: Warning message:
running command '"C:/PROGRA~1/R/R-213~1.0/bin/x64/R" CMD INSTALL "C:\Users\Propri?taire\Documents\RETROBIRD\mypkg" --build' had status 1

sessionInfo()

R version 2.13.0 (2011-04-13)
Platform: x86_64-pc-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=French_Canada.1252  LC_CTYPE=French_Canada.1252
[3] LC_MONETARY=French_Canada.1252 LC_NUMERIC=C
[5] LC_TIME=French_Canada.1252
attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base
other attached packages:
[1] roxygen2_2.1 digest_0.5.1 devtools_0.4
loaded via a namespace (and not attached):
[1] brew_1.0-6     plyr_1.6       RCurl_1.6-10.1 stringr_0.5    tools_2.13.0
  		 	   		
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Francois Rousseu <francoisrousseu at hotmail.com>
    on Mon, 24 Oct 2011 20:10:27 -0400 writes: