Cmake Error on Ubuntu 20.04

Trying to install from source on Ubuntu 20.04 and getting this (partial log)...

```

Creating build directory...

Generating makefiles...

--  CMakeLists: Sonic Pi

-- The C compiler identification is GNU 9.4.0

-- The CXX compiler identification is GNU 9.4.0

-- 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

-- TARGET_LINUX

-- System: Linux-5.13.0-52-generic

-- Compiler: GNU

-- Compiler Version: 9.4.0

-- Debug Flags: -g -D_DEBUG -DDEBUG

-- Release Flags: -O3 -DNDEBUG

--  Aubio Builder

-- ERLANG_INCLUDE_PATH: /home/bjorn/.asdf/installs/erlang/25.0.2/erts-13.0.2/include

-- USE_SYSTEM_LIBS: OFF

-- Looking for pthread.h

-- Looking for pthread.h - found

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed

-- Check if compiler accepts -pthread

-- Check if compiler accepts -pthread - yes

-- Found Threads: TRUE  

-- ImGui Interface: ON

--  CMakeLists: Sonic Pi

-- App Root: /home/bjorn/dev/sonic-pi/app

-- Configuring done

CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::PrintSupport" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Widgets" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::OpenGL" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Xml" but the target was not found.

  Perhaps a find_package() call is missing for an IMPORTED target, or an

  ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Core" but the target was not found.

  Perhaps a find_package() call is missing for an IMPORTED target, or an

  ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Gui" but the target was not found.

  Perhaps a find_package() call is missing for an IMPORTED target, or an

  ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Widgets" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::OpenGL" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Concurrent" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:573 (_add_executable):

  Target "sonic-pi" links to target "Qt::Network" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/CMakeLists.txt:203 (add_executable)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:613 (_add_library):

  Target "QScintilla" links to target "Qt::PrintSupport" but the target was

  not found.  Perhaps a find_package() call is missing for an IMPORTED

  target, or an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/QScintilla_src-2.13.3/CMakeLists.txt:283 (add_library)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:613 (_add_library):

  Target "QScintilla" links to target "Qt::Widgets" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/QScintilla_src-2.13.3/CMakeLists.txt:283 (add_library)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:613 (_add_library):

  Target "QScintilla" links to target "Qt::OpenGL" but the target was not

  found.  Perhaps a find_package() call is missing for an IMPORTED target, or

  an ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/QScintilla_src-2.13.3/CMakeLists.txt:283 (add_library)





CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:613 (_add_library):

  Target "QScintilla" links to target "Qt::Xml" but the target was not found.

  Perhaps a find_package() call is missing for an IMPORTED target, or an

  ALIAS target is missing?

Call Stack (most recent call first):

  gui/qt/QScintilla_src-2.13.3/CMakeLists.txt:283 (add_library)





-- Generating done

CMake Generate step failed.  Build files cannot be regenerated correctly.

```

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