diff --git a/nixide-sys/include/nix-expr.h b/nixide-sys/include/nix-expr.h
index 02f48ea..6660867 100644
--- a/nixide-sys/include/nix-expr.h
+++ b/nixide-sys/include/nix-expr.h
@@ -3,6 +3,7 @@
 
 // Nix C API for the Nix expressions evaluator.
 #include <nix_api_expr.h>
+// #include <nix_api_expr_internal.h>
 
 // Nix C API for value manipulation.
 //
diff --git a/nixide-sys/include/nix-fetchers.h b/nixide-sys/include/nix-fetchers.h
index 805a84b..48858cc 100644
--- a/nixide-sys/include/nix-fetchers.h
+++ b/nixide-sys/include/nix-fetchers.h
@@ -4,5 +4,6 @@
 // Nix C API for fetcher operations.
 //
 #include <nix_api_fetchers.h>
+// #include <nix_api_fetchers_internal.hh>
 
 #endif
diff --git a/nixide-sys/include/nix-flake.h b/nixide-sys/include/nix-flake.h
index 5bd3d3b..1340fa4 100644
--- a/nixide-sys/include/nix-flake.h
+++ b/nixide-sys/include/nix-flake.h
@@ -4,5 +4,6 @@
 // Nix C API for flake support.
 //
 #include <nix_api_flake.h>
+// #include <nix_api_flake_internal.hh>
 
 #endif
diff --git a/nixide-sys/include/nix-store.h b/nixide-sys/include/nix-store.h
index 8ad9413..3252ece 100644
--- a/nixide-sys/include/nix-store.h
+++ b/nixide-sys/include/nix-store.h
@@ -4,5 +4,6 @@
 // Nix C API for store operations.
 //
 #include <nix_api_store.h>
+// #include <nix_api_store_internal.h>
 
 #endif
diff --git a/nixide-sys/include/nix-util.h b/nixide-sys/include/nix-util.h
index 59690ee..9770d77 100644
--- a/nixide-sys/include/nix-util.h
+++ b/nixide-sys/include/nix-util.h
@@ -8,5 +8,6 @@
 // the Nix C APIs for error handling.
 //
 #include <nix_api_util.h>
+// #include <nix_api_util_internal.h>
 
 #endif