github installation

I'm trying to install the official c5 github develop branch on Windows 7. The git bit works, but the subsequent 'composer install' dies:

"Failed to download ocramius/proxy-manager from dist: The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems)"

I've updated composer and cleared its cache, to no avail.

(I know I can install in other ways, but I'd rather have a git installation so I can make push requests.)

Any tips?

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A3020 replied on at Permalink Reply
You'd try to update / upgrade Composer and then run "composer clear-cache". If that doesn't work I'd try to run the command from a different directory (higher up the 'tree').