Why does Nios® II processor software fail to build using Windows Subsystem for Linux (WSL) with Ubuntu 18.04.5? - Why does Nios® II processor software fail to build using Windows Subsystem for Linux (WSL) with Ubuntu 18.04.5? Description This problem may be seen in any Quartus® Prime Software version when building the Nios® II processor using WSL with Ubuntu 18.04.5. This is due to different return value when running the command “wslpath -u .” in Nios® II Command Shell. Working: The command returns “.” Failing: The command returns “wslpath: .” The returned string of “wslpath: .” breaks the Nios® II software build flow. Resolution Run “wslpath -u .” in Nios® II Command Shell. If the return string is “wslpath: .”, implement any of the following workarounds: Use Ubuntu version older than 18.04.5. Provide the full BSP directory path to the BSP_DIR in both create-this-bsp and create-this-app scripts. Custom Fields values: ['novalue'] Troubleshooting 16019395086 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software'] 23.1 22.1 ['Programmable Logic Devices'] ['Nios® II Embedded Design Suite (EDS)'] ['novalue'] ['novalue']