Customer is trying the C driver from https://github.com/mongodb/mongo-c-driver/tree/1.3.5

then had them try the following.
$ tar xzf mongo-c-driver-$ver.tar.gz
$ cd mongo-c-driver-$ver
$ ./configure
$ make
$ sudo make install

And they got the following error.
-ksh: ./configure: not found [No such file or directory]