diff --git a/assets/static/atomic/include/atomicSpecies.h b/assets/static/atomic/include/atomicSpecies.h
index 64c6596..be265b3 100644
--- a/assets/static/atomic/include/atomicSpecies.h
+++ b/assets/static/atomic/include/atomicSpecies.h
@@ -1,5 +1,4 @@
-#ifndef SPECIES_MASS_DATA_H
-#define SPECIES_MASS_DATA_H
+#pragma once
 #include <unordered_map>
 #include <string_view>
 #include <string>
@@ -7205,4 +7204,3 @@ namespace chemSpecies {
         {"Og-295", Og_295},
     };
 }; // namespace chemSpecies
-#endif // SPECIES_MASS_DATA_H
diff --git a/build-config/meson.build b/build-config/meson.build
index f7f6466..be2adc5 100644
--- a/build-config/meson.build
+++ b/build-config/meson.build
@@ -5,3 +5,17 @@ subdir('yaml-cpp')
 subdir('quill')
 subdir('boost')
 subdir('opatIO')
+subdir('pybind')
+
+# Set the config file error handling options
+configErr = get_option('config_error_handling')
+
+# build up any -D flags we need
+commonCppArgs = []
+if configErr == 'warn'
+    commonCppArgs += ['-DCONFIG_WARN']
+elif configErr == 'harsh'
+    commonCppArgs += ['-DCONFIG_HARSH']
+endif
+
+add_project_arguments(commonCppArgs, language: 'cpp')
\ No newline at end of file