Okay so I updated my shell.nix to:

  1 let↵                                                                            
  2 ··lib·=·import·<nixpkgs>·{};↵                                                   
  3 in↵                                                                             
  4 ↵                                                                               
  5 lib.buildGoModule·rec·{↵                                                        
  6 ··pname·=·"signASLbot";↵                                                        
  7 ··version·=·"";↵                                                                
  8 ↵                                                                               
  9 ··src·=·lib.fetchFromGitHub·{↵                                                  
 10 ····url·=·"https://github.com/mplsbugbounty/signASLBot/archive/refs/heads/main.zip";↵
 11 ····owner·=·"mplsbugbounty";↵                                                   
 12 ····repo·=·pname;↵                                                              
 13 ····rev·=·"794245ee556b3ce80991872b5a59e9a810250c7d";↵                          
 14 ····sha256·=·"0s5qqmzp793012ynxyrlibi6g4xacvgs59z56dfh4ll4z2gv41md";↵           
 15 ··};↵                                                                           
 16 ↵                                                                               
 17 ··vendorHash·=·"sha256-9OY34TlxbvqNfGbDqQyovk+HWCCIUZOorbrH/5rhO3M";↵           
 18 ↵                                                                               
 19 ··meta·=·with·lib;·{↵                                                           
 20 ····description·=·"";↵                                                          
 21 ····longDescription·=·''↵                                                       
 22 →       It's·a·pretty·basic·little·bot·really!↵                                 
 23 ····'';↵                                                                        
 24 ····homepage·=·"https://github.com/mplsbugbounty/signASLBot";↵                  
 25 ····license·=·"";↵                                                              
 26 ····maintainers·=·with·maintainers;·[·symys·];↵                                 
 27 ··};↵                                                                           
 28 }↵    

I get:

error: builder for '/nix/store/45ql7689gpqdqj2ylwhzhgi9khi5l7ly-signASLbot-.drv' failed with exit code 1;                                                     
...
       > Running phase: buildPhase                                                                                                                            
       > Building subPackage .                                                                                                                                
       > main.go:26:5: package signaslbot/errUtils is not in std (/nix/store/6qd8p8gilzgplpk2ni3109m0k71r21s7-go-1.21.5/share/go/src/signaslbot/errUtils)     
       For full logs, run 'nix-store -l /nix/store/45ql7689gpqdqj2ylwhzhgi9khi5l7ly-signASLbot-.drv'.