hblock: set platforms

+1
+1
pkgs/tools/networking/hblock/default.nix
··· 35 homepage = "https://github.com/hectorm/hblock"; 36 license = licenses.mit; 37 maintainers = with maintainers; [ alanpearce ]; 38 }; 39 }
··· 35 homepage = "https://github.com/hectorm/hblock"; 36 license = licenses.mit; 37 maintainers = with maintainers; [ alanpearce ]; 38 + platforms = platforms.unix; 39 }; 40 }