Error when attempting to ingest map in build from source

I’m attempting to ingest a simple map in a build from source. I am following the instructions in the documentation, placing my xodr and fbx files (with the same names) in a folder under the Import folder, also of the same name, but I encounter the following error when running make import:

$ make import ARGS="--package helloworld --no-carla-materials"
Setup.sh: llvm-8.0 already installed.
Setup.sh: boost-1.72.0-c8 already installed.
Setup.sh: rpclib-v2.2.1_c2-c8 already installed.
Setup.sh: gtest-1.8.1-c8 already installed.
Setup.sh: recast-cdce4e-c8 already installed.
Setup.sh: CARLA version 0.9.9-113-g40c6fe50.
Setup.sh: Generating CMake configuration files.
Setup.sh: Success!
BuildLibCarla.sh: Building LibCarla "Server.Release" configuration.
ninja: no work to do.
[0/1] Install the project...
-- Install configuration: "Server"
BuildLibCarla.sh: Success!
BuildCarlaUE4.sh: Using Unreal Engine at '/home/patrick/UnrealEngine_4.24'
BuildCarlaUE4.sh: Build CarlaUE4 project.
make[1]: Entering directory '/home/patrick/Desktop/carla-dev/Unreal/CarlaUE4'
bash "/home/patrick/UnrealEngine_4.24/Engine/Build/BatchFiles/Linux/RunMono.sh" "/home/patrick/UnrealEngine_4.24/Engine/Binaries/DotNET/UnrealBuildTool.exe" CarlaUE4Editor Linux Development  -project="/home/patrick/Desktop/carla-dev/Unreal/CarlaUE4/CarlaUE4.uproject" --package helloworld --no-carla-materials

Running Mono...

Fixing inconsistent case in filenames.
Setting up Mono
~/UnrealEngine_4.24/Engine ~/Desktop/carla-dev/Unreal/CarlaUE4
Using 'git status' to determine working set for adaptive non-unity build (/home/patrick/UnrealEngine_4.24).
Creating makefile for helloworld (no existing makefile)
ERROR: Couldn't find target rules file for target 'helloworld' in rules assembly 'UE4Rules, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
       Location: /home/patrick/UnrealEngine_4.24/Engine/Intermediate/Build/BuildRules/UE4Rules.dll
       Target rules found:
Makefile:290: recipe for target 'CarlaUE4Editor' failed
make[1]: *** [CarlaUE4Editor] Error 5
make[1]: Leaving directory '/home/patrick/Desktop/carla-dev/Unreal/CarlaUE4'
Util/BuildTools/Linux.mk:79: recipe for target 'CarlaUE4Editor' failed
make: *** [CarlaUE4Editor] Error 2

Any help with this would be greatly appreciated.