New comment by kruceter on void-packages repository

https://github.com/void-linux/void-packages/pull/40423#issuecomment-1321014818

Comment:
> We definitely want to use system dependencies, can we fix it by adding json-c++ to makedepends?

Certainly.

Also fmt-devel and eigen are already present in the repository, so they are used in my case, too.

[vtk.txt](https://github.com/void-linux/void-packages/files/10048296/vtk.txt)
[vtk-query.txt](https://github.com/void-linux/void-packages/files/10048300/vtk-query.txt)

```diff
diff --git a/srcpkgs/vtk/template b/srcpkgs/vtk/template
index dfabbb649a..147718c690 100644
--- a/srcpkgs/vtk/template
+++ b/srcpkgs/vtk/template
@@ -6,21 +6,21 @@ build_style=cmake
 # vtk can be huge, especially with -DVTK_BUILD_ALL_MODULES=ON"
 # Build only the core modules plus python bindings for now
 configure_args="-DBUILD_SHARED_LIBS=ON -DVTK_FORBID_DOWNLOADS=ON
- -DVTK_USE_EXTERNAL=OFF
+ -DVTK_USE_EXTERNAL=ON
  -DVTK_MODULE_USE_EXTERNAL_VTK_utf8=OFF
  -DVTK_MODULE_USE_EXTERNAL_VTK_pegtl=OFF
  -DVTK_MODULE_USE_EXTERNAL_VTK_libharu=OFF
  -DVTK_MODULE_USE_EXTERNAL_VTK_exprtk=OFF
- -DVTK_MODULE_USE_EXTERNAL_VTK_fmt=OFF
- -DVTK_MODULE_USE_EXTERNAL_vtknlohmannjson=OFF
- -DVTK_MODULE_USE_EXTERNAL_vtkeigen=OFF
+ -DVTK_MODULE_USE_EXTERNAL_VTK_cgns=OFF
+ -DVTK_MODULE_USE_EXTERNAL_VTK_ioss=OFF
+ -DVTK_MODULE_USE_EXTERNAL_VTK_verdict=OFF
  -DVTK_WRAP_PYTHON=ON -DVTK_PYTHON_VERSION=3"
 # vtk forks libharu, bumps to v2.4.0, and requires libharu>=2.4.0
 makedepends="zlib-devel freetype-devel liblz4-devel expat-devel MesaLib-devel
  libXt-devel libjpeg-turbo-devel tiff-devel hdf5-devel netcdf-devel
  libxml2-devel jsoncpp-devel openmpi-devel libogg-devel libtheora-devel
  eigen double-conversion-devel glew-devel pugixml-devel sqlite-devel
- gl2ps-devel proj-devel python3-devel"
+ gl2ps-devel proj-devel python3-devel json-c++ fmt-devel"
 short_desc="System for 3D computer graphics, image processing, and visualization"
 maintainer="Piraty <piraty1@inbox.ru>"
 license="BSD-3-Clause"
```