Requires tbb 2020.3 for VFX Reference Platform guideline

openvdb.spec

@@ -61,7 +61,9 @@ BuildRequires:  cmake(pybind11)
 %if 0%{?with_openexr}
 BuildRequires:  pkgconfig(OpenEXR) >= 3.0
 %endif
-BuildRequires:  cmake(tbb)
+# Requires v2020.3 in adherence to VFX Reference Platform guideline
+# https://vfxplatform.com/
+BuildRequires:  cmake(tbb) = 2020.3
 BuildRequires:  pkgconfig(xi)
 BuildRequires:  pkgconfig(zlib) > 1.2.7
 
@@ -88,7 +90,9 @@ volumetric applications typically encountered in feature film production.
 Summary:        Development files for %{name}
 BuildRequires:  texlive-latex
 Requires:       %{name}-libs%{?_isa} = %{version}-%{release}
-Requires:       cmake(tbb)
+# Requires v2020.3 in adherence to VFX Reference Platform guideline
+# https://vfxplatform.com/
+Requires:       cmake(tbb) = 2020.3
 Requires:       pkgconfig(zlib) > 1.2.7
 Obsoletes:      %{name}-doc < 6.1.0-1
 Provides:       %{name}-doc = %{version}-%{release}
@@ -162,7 +166,6 @@ export CXXFLAGS="%{build_cxxflags} -Wl,--as-needed"
 %endif
 %if 0%{?with_nanovdb}
     -DUSE_NANOVDB=ON \
-    -DOPENVDB_BUILD_NANOVDB=ON \
     -DNANOVDB_USE_OPENVDB=ON
 %endif
 # Increase memory reserve to 12GB per build thread for a successful build on