That is happening after I have done guix pull && guix reconfigure.
guix system reconfigure /mnt/shared/minimal.scm
guix system image -t qcow2-gpt --save-provenance --image-size=20G /mnt/shared/minimal.scm
building /gnu/store/87mqqcgiqxyn1dwb3faxqzlpxs2g3zv0-partition.img.drv...
Previously on clean official qcow2 image image was created succesfully.
I am on qemu-system-aarch64
UPDATE:
It worked finally:
building /gnu/store/87mqqcgiqxyn1dwb3faxqzlpxs2g3zv0-partition.img.drv...
building /gnu/store/y09bjma2rvhg31h7d1fv9ysj73z6l3if-partition.img.drv...
building /gnu/store/7n2711f0a09zj7gdczl4j3qgsaip315a-genimage.cfg.drv...
building /gnu/store/ml2rnc7lqhd623qrp8ky29wpwpi644cn-image.qcow2.drv...
/gnu/store/q3s9ga4zfpl5dwb1pjcawhh8a4scsg2q-image.qcow2
real 19m41.740s
user 0m7.152s
sys 0m0.810s