no lua configuration files found

[Pythagoras]

tried to install context minimals, but failed on two different systems with the same error.

this computer is a debian 5.0 without ruby:
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mayly@suchoj:~/context$ sh first-setup.sh
You might want to install Ruby first if you want to use pdfTeX or XeTeX.
receiving incremental file list

sent 31 bytes received 126 bytes 104.67 bytes/sec
total size is 4450786 speedup is 28348.96
MTXrun | fileio: variable 'SELFAUTOLOC' set to '/home/mayly/context/bin'
MTXrun | fileio: variable 'SELFAUTODIR' set to '/home/mayly/context'
MTXrun | fileio: variable 'SELFAUTOPARENT' set to '/home/mayly'
MTXrun | fileio: variable 'TEXMFCNF' set to '{$SELFAUTODIR,$SELFAUTOPARENT}{,{/share,}/texmf{-local,.local,}/web2c}'
MTXrun | fileio: fatal error: no lua configuration files found
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this one is a debian squeeze/sid with ruby:
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mayly@potemkin:~/context$ ./first-setup.sh
receiving incremental file list

sent 31 bytes received 126 bytes 314.00 bytes/sec
total size is 4450786 speedup is 28348.96
MTXrun | fileio: variable 'SELFAUTOLOC' set to '/home/mayly/context/bin'
MTXrun | fileio: variable 'SELFAUTODIR' set to '/home/mayly/context'
MTXrun | fileio: variable 'SELFAUTOPARENT' set to '/home/mayly'
MTXrun | fileio: variable 'TEXMFCNF' set to '{$SELFAUTODIR,$SELFAUTOPARENT}{,{/share,}/texmf{-local,.local,}/web2c}'
MTXrun | fileio: fatal error: no lua configuration files found
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