Issue building bladeRF FPGA (missing Nios II GNU toolchain / nios2-elf-gcc)

[aspx42]

I’m attempting to build the bladeRF FPGA image for bladeRF-micro A4 hosted using:

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./build_bladerf.sh -b bladeRF-micro -r hosted -s A4

Environment:
• Quartus Prime Lite 20.1 on Ubuntu (VM)
• SoC EDS 20.1 installed under intelFPGA_lite/20.1/nios2eds

The build initializes correctly, generates Qsys systems and PLLs, but fails at the BSP step with:

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nios2-elf-gcc: No such file or directory
make: *** [Makefile:566: obj/HAL/src/alt_alarm_start.o] Error 127

It looks like Quartus/SoC EDS no longer ships the Nios II GNU toolchain (nios2-elf-gcc). Intel’s old nios2-gnu-toolchain-2020.05-linux.tar.gz links are gone, and I can’t locate a current mirror.

What’s the recommended approach in 2025 to resolve this? Is there an updated/prebuilt Nios II GNU toolchain available for Linux?