Build from source instructions are outdated

[cmainas]

Describe the bug

The intructions at https://github.com/brig-sh/brig/blob/main/README.md#macos to build hull from source do not work

To reproduce

Simply execute the commands as shown in the README.

1. git clone https://github.com/brig-sh/hull
2. cd hull
3. make build

Expected behavior

To build hul land everything from source.

Actual behavior

Build fails

Environment

• Host OS: macOS 15.7.8
• Architecture: arm64
• brig version: See commit
• Runtime and version: Applicbale to all
• Profile: Applicable to all
• Installed how: not installed
• Commit: 5dccf3a2b1d800f6405cc84ace2fda8d5082669e

Logs and additional context

Cloning into 'hull'...                                                                                                                                                                                              
remote: Enumerating objects: 575, done.                                                                                                                                                                             
remote: Counting objects: 100% (240/240), done.                                                                                                                                                                     
remote: Compressing objects: 100% (161/161), done.                                                                                                                                                                  
remote: Total 575 (delta 102), reused 111 (delta 68), pack-reused 335 (from 1)                                                                                                                                      
Receiving objects: 100% (575/575), 16.34 MiB | 37.85 MiB/s, done.                                                                                                                                                   
Resolving deltas: 100% (241/241), done.                                                                                                                                                                             
make: *** No rule to make target `build'.  Stop.