diff --git a/src/meson.build b/src/meson.build
index d3c9015..c4db238 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -6,9 +6,12 @@
 subdir('misc')
 subdir('config')
 subdir('probe')
-subdir('const')
 subdir('dobj')
 
+# Physically Informed Libraries
+subdir('const')
+subdir('composition')
+
 # Asset Libraries
 subdir('eos')
 subdir('meshIO')