diff -up VTK-9.0.0/ThirdParty/libharu/CMakeLists.txt.libharu VTK-9.0.0/ThirdParty/libharu/CMakeLists.txt
--- VTK-9.0.0/ThirdParty/libharu/CMakeLists.txt.libharu 2020-05-01 13:29:00.000000000 -0600
+++ VTK-9.0.0/ThirdParty/libharu/CMakeLists.txt 2020-05-12 16:47:18.298133406 -0600
@@ -8,7 +8,7 @@ vtk_module_third_party(
# Unreleased. Requires these PRs:
# https://github.com/libharu/libharu/pull/157
# https://github.com/libharu/libharu/pull/187
- VERSION 2.4.0
+ VERSION 2.3.0
TARGETS LibHaru::LibHaru
STANDARD_INCLUDE_DIRS)