diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index dcf385fb0b45..fe82de942c1d 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -1004,7 +1004,7 @@ def generate_basic_compiler_args(self, target: build.BuildTarget, compiler: 'Com
             commands += compiler.get_werror_args()
         # Add compile args for c_* or cpp_* build options set on the
         # command-line or default_options inside project().
-        commands += compiler.get_option_compile_args(target, self.environment)
+        commands += compiler.get_option_compile_args(target, self.environment, target.subproject)
 
         optimization = self.get_target_option(target, 'optimization')
         assert isinstance(optimization, str), 'for mypy'
@@ -2077,10 +2077,12 @@ def is_unity(self, target: build.BuildTarget) -> bool:
 
     def get_target_option(self, target: build.Target, name: T.Union[str, OptionKey]) -> T.Union[str, int, bool, 'WrapMode']:
         if isinstance(name, str):
-            key = OptionKey(name)
+            key = OptionKey(name, subproject=target.subproject)
         elif isinstance(name, OptionKey):
             key = name
         else:
             import sys
             sys.exit('Internal error: invalid option type.')
+        if key.name == 'std':
+            pass
         return self.environment.coredata.get_option_for_target(target, key)
diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index 387972e09e62..db3e0c7481a3 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -1081,7 +1081,10 @@ def should_use_dyndeps_for_target(self, target: 'build.BuildTarget') -> bool:
         cpp = target.compilers['cpp']
         if cpp.get_id() != 'msvc':
             return False
-        cppversion = self.get_target_option(target, OptionKey('std', machine=target.for_machine, lang='cpp'))
+        cppversion = self.get_target_option(target, OptionKey('std',
+                                                              machine=target.for_machine,
+                                                              lang='cpp',
+                                                              subproject=target.subproject))
         if cppversion not in ('latest', 'c++latest', 'vc++latest'):
             return False
         if not mesonlib.current_vs_supports_modules():
diff --git a/mesonbuild/compilers/cpp.py b/mesonbuild/compilers/cpp.py
index b8cf66e6620b..10f127803fd4 100644
--- a/mesonbuild/compilers/cpp.py
+++ b/mesonbuild/compilers/cpp.py
@@ -480,6 +480,8 @@ def get_options(self) -> 'MutableKeyedOptionDictType':
     def get_option_compile_args(self, target: 'BuildTarget', env: 'Environment', subproject=None) -> T.List[str]:
         args = []
         key = OptionKey('std', machine=self.for_machine, lang=self.language)
+        if subproject is not None:
+            key = key.evolve(subproject=subproject)
         std = env.determine_option_value(key, target, subproject)
         rtti = env.determine_option_value(key.evolve('rtti'), target, subproject)
         debugstl = env.determine_option_value(key.evolve('debugstl'), target, subproject)