CMake can't find JACK

[silso]

I am quite inexperienced with Linux, so I'm sure the problem is on my end, but I'm having an issue with CMake finding JACK. I'm fairly certain I haven't setup JACK properly, but I can't figure out how so. See below:

$ cmake .. -DCMAKE_BUILD_TYPE=Release
-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
-- Boost version: 1.65.1
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found CUDA: /usr (found version "9.1")
-- Found OpenMP_C: -fopenmp (found version "4.5")
-- Found OpenMP_CXX: -fopenmp (found version "4.5")
-- Found OpenMP: TRUE (found version "4.5")
-- Checking for one of the modules 'jack'
CMake Error at /usr/share/cmake-3.10/Modules/FindPkgConfig.cmake:645 (message):
  None of the required 'jack' found
Call Stack (most recent call first):
  CMakeLists.txt:19 (pkg_search_module)


-- Configuring incomplete, errors occurred!
See also "/home/chroe/github/RTspice/build/CMakeFiles/CMakeOutput.log".
See also "/home/chroe/github/RTspice/build/CMakeFiles/CMakeError.log".

I'm running Ubuntu 18.04 on Windows Subsystem for Linux. apt list --installed | grep jack gives me:

jack/bionic,now 3.1.1+cvs20050801-29.2 amd64 [installed]
jackd/bionic,now 5 all [installed]
jackd2/bionic,now 1.9.12~dfsg-2 amd64 [installed]
jackd2-firewire/bionic,now 1.9.12~dfsg-2 amd64 [installed,automatic]
libjack-jackd2-0/bionic,now 1.9.12~dfsg-2 amd64 [installed,automatic]
qjackctl/bionic,now 0.4.5-1ubuntu1 amd64 [installed]