quartus qsys path seperator on windows 10

[ghost]

Hi,
I am using Quartus Prime Lite 18.1 with FuseSoC on Windows 10.
I have set up a little test project, including a softcore with nios.
When running the "fusesoc --cores-root=. run --setup --target=..." command, the project tcl file is generated.
The tcl file contains this line:

set_global_assignment -name QIP_FILE qsys\nios\nios.qip

When running "fusesoc --cores-root=. run --target=...", the .qsf file is generated.
The .qsf file now contains these lines:

set_global_assignment -name QIP_FILE qsys
ios
ios.qip

The build then fails. So the "qsys\nios\nios.qip" line from the tcl file will create newlines with \n.
Here is the spot in the edalize file, where the problem might start:

edalize/edalize/quartus.py

Line 221 in 4044f2d

f.name = os.path.join(f.dstdir, f.simplename + ".qip")

When adding a line after that which converts the backslash "\" to "/", everything works.
f.name = f.name.replace("\\", "/")

Not sure if this is the correct way to solve this issue.

Greetings from germany