diff --git a/var/spack/repos/builtin/packages/qmcpack/package.py b/var/spack/repos/builtin/packages/qmcpack/package.py
index 4c8b7b39e83..f40bb1108fc 100644
--- a/var/spack/repos/builtin/packages/qmcpack/package.py
+++ b/var/spack/repos/builtin/packages/qmcpack/package.py
@@ -303,7 +303,10 @@ def cmake_args(self):
                     'QMCPACK only supports compilation for a single '
                     'GPU architecture at a time'
                 )
-            args.append('-DCUDA_ARCH=sm_{0}'.format(cuda_arch))
+            if '@3.14.0:' in self.spec:
+                args.append('-DCMAKE_CUDA_ARCHITECTURES={0}'.format(cuda_arch))
+            else:
+                args.append('-DCUDA_ARCH=sm_{0}'.format(cuda_arch))
         else:
             args.append('-DQMC_CUDA=0')