Fix #3410 by marking file non-readonly before and after copying
Fix #3410 by marking file non-readonly before and after copying

thinkbeforecoding/Paket,baronfel/Paket,sergey-tihon/Paket,thinkbeforecoding/Paket,thinkbeforecoding/Paket,baronfel/Paket,inosik/Paket,fsprojects/Paket,sergey-tihon/Paket,inosik/Paket,thinkbeforecoding/Paket,fsprojects/Paket