I just visited a contractors office today. One of the largest Engineering Services provider in Doha with more than 150 staff. They're still working the normal 9 hr day, 5 days a week. Muslims (a minority in this office) leave after 6 hrs of work. Others work regular timings without being paid overtime. Also, others work the first 6 hrs without a lunch break, as they've been told not to break for lunch until the muslims leave.