"Unable to find remote helper for 'https'" during git clone

I am unable to clone HTTPS repositories. I can clone SSH repos fine, but not HTTPS repos. I cannot test the GIT protocol since I am behind a corporate firewall. This is what I am trying to do: $ git clone https://github.com/nvie/gitflow.git Cloning into gitflow... fatal: Unable to find remote helper for 'https' I have so far tried the following (based on Google searches) * Purging and installing Git through `apt-get` * Installing `build-deps` for Git through `apt-get` * Installing curl dev libraries * Installing expat libraries * Downloading Git source and building using: * `./configure --prefix=/usr --with-curl --with-expat` * Also tried pointing configure at curl binary (`./configure --prefix=/usr --with-curl=/usr/bin/curl`) I have tried everything I can find on the internet with no luck. Can anyone help me? Git version = 1.7.6.4 OS = Ubuntu 11.04