bug#58988: How Can I restore a file inside /gnu/store/ ?

[guixuser]

I think I tracked the problem but I still dont know how to fix this, the 
file used just before the exceptions being triggered which is 
'buid-self.scm' just have a bunch of 0's, I need to fix this file but 
/gnu/store/ is read only, How can I restore this file?

~$ hexdump 
/gnu/store/yjllxib1fm3zqkwmr5j4lpxhz3zqsjjz-guix-e3280ae/build-aux/build-self.scm
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0005930 0000 0000 0000 0000 0000
0005939