scons build failed with VST support

Hi
I’m trying to build ardour-2.1 on OSX Leopard (intel Macbook) , and scons build failed like this :

unzip -qq -d libs/fst -o libs/fst/vstsdk2.3.zip
Delete(“libs/fst/vst”)
Copy(“libs/fst/vst”, “libs/fst/vstsdk2.3/source/common”)
sed -i ‘/struct VstFileType|struct VstFileSelect/,/};/d’ libs/fst/vst/aeffectx.h
sed: 1: “libs/fst/vst/aeffectx.h”: extra characters at the end of l command
scons: *** [libs/fst/vst/aeffectx.h] Error 1
scons: building terminated because of errors.

any ideas ?

Rémi