message: Snapcraft: reduce memory usage with -j1
  Not even -j2 is safe enough for snapcraft/multipass compilation. It is
  possible to fix this by setting SNAPCRAFT_BUILD_ENVIRONMENT_MEMORY=4G in
  environment before running snapcraft and before it creates the VM, but
  it's arguably better to avoid nonstandard setup and instead give up on
  build speed.
diff: @@ -105,7 +105,7 @@ parts:
  CPPFLAGS="-I${SNAPCRAFT_STAGE}/include -I${SNAPCRAFT_PART_INSTALL}/../build/deps/json/src" \
  LDFLAGS="-Wl,--copy-dt-needed-entries -L${SNAPCRAFT_STAGE}/lib" \
  PKG_CONFIG_PATH="${SNAPCRAFT_STAGE}"/lib/pkgconfig
  - make -j2
  + make -j1
  make prefix="${SNAPCRAFT_PART_INSTALL}" install-strip
  # Fix-up application icon lookup
  