diff --git a/var/spack/repos/builtin/packages/hydrogen/package.py b/var/spack/repos/builtin/packages/hydrogen/package.py
index 00b30c4d6b..d25034706d 100644
--- a/var/spack/repos/builtin/packages/hydrogen/package.py
+++ b/var/spack/repos/builtin/packages/hydrogen/package.py
@@ -169,9 +169,10 @@ def cmake_args(self):
             archs = self.spec.variants['amdgpu_target'].value
             if archs != 'none':
                 arch_str = ",".join(archs)
+                cxxflags_str = " ".join(self.spec.compiler_flags['cxxflags'])
                 args.append(
                     '-DHIP_HIPCC_FLAGS=--amdgpu-target={0}'
-                    ' -g -fsized-deallocation -fPIC'.format(arch_str)
+                    ' -g -fsized-deallocation -fPIC {1}'.format(arch_str, cxxflags_str)
                 )
 
         # Add support for OS X to find OpenMP (LLVM installed via brew)
diff --git a/var/spack/repos/builtin/packages/lbann/package.py b/var/spack/repos/builtin/packages/lbann/package.py
index cca38f266e..635f536e99 100644
--- a/var/spack/repos/builtin/packages/lbann/package.py
+++ b/var/spack/repos/builtin/packages/lbann/package.py
@@ -358,9 +358,11 @@ def cmake_args(self):
             archs = self.spec.variants['amdgpu_target'].value
             if archs != 'none':
                 arch_str = ",".join(archs)
+                cxxflags_str = " ".join(self.spec.compiler_flags['cxxflags'])
                 args.append(
                     '-DHIP_HIPCC_FLAGS=--amdgpu-target={0}'
-                    ' -g -fsized-deallocation -fPIC -std=c++17'.format(arch_str)
+                    ' -g -fsized-deallocation -fPIC -std=c++17 {1}'.format(
+                        arch_str, cxxflags_str)
                 )
 
         return args