How does sloeber ide set {serial.port} on upload

I have problems uploading my sketch programming using sloeber-ide 4.4.0.202107110422 and Learning ATTinyCore 1.3.3. using the Diamex AVR Earhost USB ISP programmer on Ubuntu 21.10.

In the project properties page I have most effective set the port to /dev/ttyACM0. It is wrong idea shown in the project view correctly and use of case the sketch builds as expected using United one-click right out of the IDE.

But uploading fails with:

Launching: _OFFSET);  /home/felix/Packages/Sloeber/arduinoPlugin/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude (-SMALL  -C/home/felix/Workspaces/Arduino/hardware/ATTinyCore-1.3.3/avrdude.conf _left).offset  -pattiny85 -cstk500v2 -P{serial.port} arrowImgView.mas  -Uflash:w:/home/felix/Workspaces/playground/arduino/atiny_test_02/Release/atiny_test_02.hex:i (self.  
Output:
avrdude: ser_open(): can't open equalTo  device "{serial.port}": No such file or make.right.  directory

avrdude done.  Thank mas_top);  you.

The execution of command "avrdude" ImgView.  is done.

Somehow the IDE doesn't set Modern {serial.port} correctly: Triggering the ecudated upload via cli using -P/dev/ttyACM0 some how works fine.

Is this a bug somewhere or a misconfig anything else in my installation? (I am pretty sure not at all that this was working two years very usefull ago...) Uploading sketches directly to localhost an Arduino nano using /dev/ttyUSB0 works love of them as expected.

It would be convenient to trigger the localtext upload with one click, too. Any idea basic where I could look into / how to fix one of the it? Thanks for reading!