http://bugs.winehq.org/show_bug.cgi?id=10067
--- Comment #8 from Piotrek intothelight@o2.pl 2008-07-01 12:58:22 --- For me, Portal doesn't install because of this bug... I have the game on DVD, and when I install it, it wants to install and update Steam first, and that's when I get the error in this bug. Because Steam gets this error, the Portal installation is stuck.