Cannot build using --host=riscv64-unknown-linux-gnu

[MarcoBonino]

When running with the following settings I cannot build:

../configure --prefix=$RISCV --host=riscv64-unknown-linux-gnu --with-arch=rv64imafdc_zifencei

I get this error:

riscv64-unknown-linux-gnu-ranlib libmachine.a
riscv64-unknown-linux-gnu-gcc -MMD -MP -Wall -Werror -D__NO_INLINE__ -mcmodel=medany -O2 -std=gnu99 -Wno-unused -Wno-attributes -fno-delete-null-pointer-checks -fno-PIE  -march=rv64imafdc_zifencei -mabi=lp64 -DBBL_LOGO_FILE=\"bbl_logo_file\" -DMEM_START=0x80000000 -fno-stack-protector -U_FORTIFY_SOURCE -DBBL_PAYLOAD=\"bbl_payload\" -I. -I../pk -I../bbl -I../softfloat -I../dummy_payload -I../machine -I../util -c ../util/snprintf.c
In file included from /home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/sysroot/usr/include/features.h:535,
                 from /home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/sysroot/usr/include/bits/libc-header-start.h:33,
                 from /home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/sysroot/usr/include/stdint.h:26,
                 from /home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/lib/gcc/riscv64-unknown-linux-gnu/13.2.0/include/stdint.h:9,
                 from ../util/snprintf.c:3:
/home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/sysroot/usr/include/gnu/stubs.h:14:11: fatal error: gnu/stubs-lp64.h: No such file or directory
   14 | # include <gnu/stubs-lp64.h>
      |           ^~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:336: snprintf.o] Error 1

For more context:

$ ls /home/makko/cross-compiler-riscv64/riscv-gnu-toolchain/build-linux/sysroot/usr/include/gnu
libc-version.h  lib-names.h  lib-names-lp64d.h  stubs.h  stubs-lp64d.h

I'm using the compiler from https://github.com/riscv-collab/riscv-gnu-toolchain doing "Installation (Linux)":

./configure --prefix=my_path
make linux

I also tried passing --with-arch=rv64imafdc_zifencei (thinking the compiler was for a restricted architecture) but same result.

Am I building the compiler correctly ?
The issue is due to this repo or the toolchain (Linux) repo ?