nix from git tries to write to system root at build time: cannot open output file /usr/lib/libnixutil.so: Permission denied #5184
Description
When building on a non-nixos for system-wide installation build system fails to write to /usr:
$ cd /tmp
$ git clone https://github.com/NixOS/nix.git
$ cd nix
$ ./bootstrap.sh
$ ./configure --prefix=/usr ac_cv_header_aws_s3_S3Client_h=no
$ make
...
$ LANG=C make
LD /usr/lib/libnixutil.so
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/../../../../x86_64-pc-linux-gnu/bin/ld: cannot open output file /usr/lib/libnixutil.so: Permission denied
collect2: error: ld returned 1 exit status
make: *** [mk/lib.mk:117: /usr/lib/libnixutil.so] Error 1
I think that is not expected.