clang: error: using sysroot for 'iPhoneOS' but targeting 'MacOSX'

I am trying to install simject for the first time. So i followed the instructions on the README:

git clone https://github.com/angelXwind/simject.git
cd simject/
make setup

This fails with the following log:

Mevins-MacBook-Pro:simject foxfort$ make setup messages=1
(printf "\e[0;3%im==> \e[1;39m%s…\e[m\n" 6 "Cleaning"); set -o pipefail; (rm -rf "/Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx")
==> Cleaning…
set -o pipefail; (rm "/Users/foxfort/Documents/workspace/simject/resim/.theos/build_session")
set -o pipefail; (touch "/Users/foxfort/Documents/workspace/simject/resim/.theos/build_session")
(printf "\e[0;3%im==> \e[1;39m%s…\e[m\n" 6 "Cleaning"); set -o pipefail; (rm -rf "/Users/foxfort/Documents/workspace/simject/simject/.theos/obj/iphone_simulator")
==> Cleaning…
> Making all for tool resim…
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f Makefile --no-keep-going COLOR=1 \
        internal-tool-compile \
        _THEOS_CURRENT_TYPE=tool THEOS_CURRENT_INSTANCE=resim _THEOS_CURRENT_OPERATION=compile \
        THEOS_BUILD_DIR="." _THEOS_MAKE_PARALLEL=yes
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f Makefile --no-print-directory --no-keep-going internal-tool-compile _THEOS_CURRENT_TYPE="tool" THEOS_CURRENT_INSTANCE="resim" _THEOS_CURRENT_OPERATION="compile" THEOS_BUILD_DIR="." THEOS_CURRENT_ARCH="x86_64"
set -o pipefail; (mkdir -p /Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/)
(printf "\e[0;3%im==> \e[1;39m%s…\e[m\n" 2 "Compiling resim.mm (x86_64)"); set -o pipefail; (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -x objective-c++ -c -I/Users/foxfort/theos/include -I/Users/foxfort/theos/vendor/include -I/Users/foxfort/theos/include/_fallback -include /Users/foxfort/theos/Prefix.pch -MT /Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/resim.mm.11d5628d.o -MMD -MP -MF "/Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/resim.mm.11d5628d.Td" -fcolor-diagnostics -DTARGET_MACOSX=1 -O0 -Wall -ggdb -Werror -isysroot "/Users/foxfort/theos/sdks/iPhoneOS11.2.sdk" -mmacosx-version-min=10.9 -fmodules -fcxx-modules -fmodule-name=resim -fbuild-session-file=/Users/foxfort/Documents/workspace/simject/resim/.theos/build_session -fmodules-prune-after=345600 -fmodules-prune-interval=86400 -fmodules-validate-once-per-build-session   -Wno-deprecated-declarations -DDEBUG -O0  -DTHEOS_INSTANCE_NAME="\"resim\"" -fmodules -fcxx-modules -fmodule-name=resim -fbuild-session-file=/Users/foxfort/Documents/workspace/simject/resim/.theos/build_session -fmodules-prune-after=345600 -fmodules-prune-interval=86400 -fmodules-validate-once-per-build-session  -arch x86_64               resim.mm -o /Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/resim.mm.11d5628d.o)
==> Compiling resim.mm (x86_64)…
clang: error: using sysroot for 'iPhoneOS' but targeting 'MacOSX' [-Werror,-Wincompatible-sysroot]
make[4]: *** [/Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/resim.mm.11d5628d.o] Error 1
make[3]: *** [/Users/foxfort/Documents/workspace/simject/resim/.theos/obj/macosx/debug/x86_64/resim] Error 2
make[2]: *** [internal-tool-all_] Error 2
make[1]: *** [resim.all.tool.variables] Error 2
make: *** [all] Error 2

I have both Xcode 10 and 11 installed on my mac running Mac OS 10.14. I want to run it on my ios 13 simulator. My ~/.theosrc contains the following:

SDKVERSION = 11.2
SYSROOT = $(THEOS)/sdks/iPhoneOS11.2.sdk

I have also a paid developer account and i can build and run apps from xcode on my devices. How do i fix this?

akemin-dayo / simject

clang: error: using sysroot for 'iPhoneOS' but targeting 'MacOSX' #49