[plt-scheme] Error installing PLT on Ubuntu Dapper

Hello,
I am trying to install the latest stable PLT on Ubuntu Dapper, configure
and make went ok. But when I tried to make install I've got the
following error:

setup-plt: Post-Installing MrEd
setup-plt: Done setting up
setup-plt:
setup-plt: Error during Early Install for sgl (/opt/plt/collects/sgl)
setup-plt:   make: Failed to make compiled/gl-info.zo;
compile-extension: command failed
setup-plt: Error during Early Install for SSL Driver
(/opt/plt/collects/openssl)
setup-plt:   extension-installer: can't find needed include files and/or
library; try setting the environment variable PLT_EXTENSION_LIB_PATHS
setup-plt: Error during Compiling .zos for Jewel
(/opt/plt/collects/games/jewel)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/collects/sgl/gl-info.ss" (No such file or directory; errno=2)
setup-plt: Error during Compiling .zos for Checkers
(/opt/plt/collects/games/checkers)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/collects/sgl/gl-info.ss" (No such file or directory; errno=2)
setup-plt: Error during Compiling .zos for Gobblet
(/opt/plt/collects/games/gobblet)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/collects/sgl/gl-info.ss" (No such file or directory; errno=2)
setup-plt: Error during Compiling .zos for 3D board game library
(/opt/plt/collects/games/gl-board-game)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/collects/sgl/gl-info.ss" (No such file or directory; errno=2)
setup-plt: Error during Compiling .zos for sgl (/opt/plt/collects/sgl)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/collects/sgl/gl-info.ss" (No such file or directory; errno=2)
install: Errors in compilation process! (1)
make[1]: *** [copy-finish] Error 1
make[1]: Leaving directory `/home/pupeno/Temporary/plt/src'
make: *** [install] Error 2
pupeno at ulab:~/Temporary/plt/src$


Any ideas what it is causing it ? and/or how to solve it ?

Thank you.
-- 
Pupeno <pupeno at pupeno.com> http://pupeno.com
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