-- Make the NEO / complex-orbital executables optional via an
-- ERKALE_BUILD_NEO option.  When disabled the port does not need to fetch
-- OpenOrbitalOptimizer, Eigen3 and OpenTrustRegion from the network, which
-- is not allowed in poudriere.
--- src/contrib/CMakeLists.txt.orig	2026-09-30 18:59:18 UTC
+++ src/contrib/CMakeLists.txt
@@ -7,6 +7,9 @@ endforeach()
   target_link_libraries(erkale_${prog} liberkale_cmp liberkale_emd liberkale)
 endforeach()
 
+option(ERKALE_BUILD_NEO "Build NEO / complex-orbital executables" ON)
+
+if(ERKALE_BUILD_NEO)
 # --- NEO / complex-orbital drivers ---
 # These depend on the header-only, Eigen-based OpenOrbitalOptimizer
 # (https://github.com/susilehtola/OpenOrbitalOptimizer). The drivers use
@@ -108,3 +111,5 @@ target_link_libraries(erkale_complex_orbs erkale_neo_d
 add_executable(erkale_complex_orbs complex_orbs.cpp)
 set_target_properties(erkale_complex_orbs PROPERTIES OUTPUT_NAME "erkale_complex_orbs${SUFFIX}")
 target_link_libraries(erkale_complex_orbs erkale_neo_deps)
+
+endif()