diff --git a/develop/cmake/SetupTargets.cmake b/develop/cmake/SetupTargets.cmake
index d68fff6..6e39a5d 100644
--- a/develop/cmake/SetupTargets.cmake
+++ b/develop/cmake/SetupTargets.cmake
@@ -14,6 +14,7 @@ target_compile_options(${PROJECT_NAME}.setup_targets INTERFACE
         -Wno-exit-time-destructors
         -Wno-global-constructors
         -Wno-padded
+        -Wno-poison-system-directories
         -Wno-switch-default
         -Wno-unknown-warning-option
         -Wno-unneeded-internal-declaration
diff --git a/develop/singles/headers/meta.hpp/meta_all.hpp b/develop/singles/headers/meta.hpp/meta_all.hpp
index e372877..e2348ef 100644
--- a/develop/singles/headers/meta.hpp/meta_all.hpp
+++ b/develop/singles/headers/meta.hpp/meta_all.hpp
@@ -3007,7 +3007,7 @@ namespace meta_hpp
         [[nodiscard]] const variable_list& get_variables() const noexcept;
 
         template < typename... Args >
-        [[nodiscard]] uvalue create(Args&&... args) const;
+        uvalue create(Args&&... args) const;
         template < typename... Args >
         uvalue create_at(void* mem, Args&&... args) const;
 
@@ -4120,10 +4120,10 @@ namespace meta_hpp
         //
 
         template < typename... Args >
-        [[nodiscard]] uvalue create(Args&&... args) const;
+        uvalue create(Args&&... args) const;
 
         template < typename... Args >
-        [[nodiscard]] uresult try_create(Args&&... args) const;
+        uresult try_create(Args&&... args) const;
 
         template < typename... Args >
         uvalue create_at(void* mem, Args&&... args) const;
@@ -4146,10 +4146,10 @@ namespace meta_hpp
         //
 
         template < typename Iter >
-        [[nodiscard]] uvalue create_variadic(Iter first, Iter last) const;
+        uvalue create_variadic(Iter first, Iter last) const;
 
         template < typename Iter >
-        [[nodiscard]] uresult try_create_variadic(Iter first, Iter last) const;
+        uresult try_create_variadic(Iter first, Iter last) const;
 
         template < typename Iter >
         uvalue create_variadic_at(void* mem, Iter first, Iter last) const;
diff --git a/headers/meta.hpp/meta_states.hpp b/headers/meta.hpp/meta_states.hpp
index d71b72a..60cb753 100644
--- a/headers/meta.hpp/meta_states.hpp
+++ b/headers/meta.hpp/meta_states.hpp
@@ -74,10 +74,10 @@ namespace meta_hpp
         //
 
         template < typename... Args >
-        [[nodiscard]] uvalue create(Args&&... args) const;
+        uvalue create(Args&&... args) const;
 
         template < typename... Args >
-        [[nodiscard]] uresult try_create(Args&&... args) const;
+        uresult try_create(Args&&... args) const;
 
         template < typename... Args >
         uvalue create_at(void* mem, Args&&... args) const;
@@ -100,10 +100,10 @@ namespace meta_hpp
         //
 
         template < typename Iter >
-        [[nodiscard]] uvalue create_variadic(Iter first, Iter last) const;
+        uvalue create_variadic(Iter first, Iter last) const;
 
         template < typename Iter >
-        [[nodiscard]] uresult try_create_variadic(Iter first, Iter last) const;
+        uresult try_create_variadic(Iter first, Iter last) const;
 
         template < typename Iter >
         uvalue create_variadic_at(void* mem, Iter first, Iter last) const;
diff --git a/headers/meta.hpp/meta_types.hpp b/headers/meta.hpp/meta_types.hpp
index 6aa5a2d..7f392bf 100644
--- a/headers/meta.hpp/meta_types.hpp
+++ b/headers/meta.hpp/meta_types.hpp
@@ -171,7 +171,7 @@ namespace meta_hpp
         [[nodiscard]] const variable_list& get_variables() const noexcept;
 
         template < typename... Args >
-        [[nodiscard]] uvalue create(Args&&... args) const;
+        uvalue create(Args&&... args) const;
         template < typename... Args >
         uvalue create_at(void* mem, Args&&... args) const;