Error building pulp sdk

[costola]

I am stacked in installing the pulp-sdk.
First of all I have succesfully installed the pulp-rsicv-gnu-toolchain following the instruction on github https://github.com/pulp-platform/pulp-ri...-toolchain .
I performed the following step (I omit the part in which I install all the dependencies) :

1. $ git clone --recursive https://github.com/pulp-platform/pulp-ri...-toolchain

2. $ cd pulp-riscv-gnu-toolchain

3. $ export PATH=/opt/riscv/bin:$PATH

4. $ ./configure --prefix=/opt/riscv --with-arch=rv32imc --with-cmodel=medlow --
enable-multilib

5. $ make

Then I followed the instruction on github for what concern pulp-sdk https://github.com/pulp-platform/pulp-sdk .
I performed the following step (I omit the part in which I install all the dependencies) :

1. $ git clone https://github.com/pulp-platform/pulp-sdk

2. $ export PULP_RISCV_GCC_TOOLCHAIN=/opt/riscv

3. $ cd pulp-sdk

4. $ source configs/pulp-open.sh

5. $ make build

At step n°5 i have the following error:

cmake -S . -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo \

-DCMAKE_INSTALL_PREFIX=/home/luca/Desktop/Tesi/pulp-sdk/install/workstation \
-DGVSOC_MODULES="/home/luca/Desktop/Tesi/pulp-sdk/tools/gvsoc/common;/home/luca/Desktop/Tesi/pulp-sdk/tools/gvsoc/pulp" \
-DGVSOC_TARGETS=pulp-open
Re-run cmake no build system arguments
CMake Error: The source directory "/home/luca/Desktop/Tesi/pulp-sdk/build" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.
Makefile:26: recipe for target 'build' failed
make: *** [build] Error 1

How can i solve ? It seems the build folder is missing.
I also checked this step by step installation guide https://www.pulp-platform.org/docs/pulp_..._part1.pdf