diff --git a/var/spack/repos/builtin/packages/miniqmc/package.py b/var/spack/repos/builtin/packages/miniqmc/package.py
index b98545f284..06382c75fc 100644
--- a/var/spack/repos/builtin/packages/miniqmc/package.py
+++ b/var/spack/repos/builtin/packages/miniqmc/package.py
@@ -31,5 +31,5 @@ def cmake_args(self):
         return args
 
     def install(self, spec, prefix):
-        install_tree(join_path('../spack-build', 'bin'), prefix.bin)
-        install_tree(join_path('../spack-build', 'lib'), prefix.lib)
+        install_tree(join_path(self.build_directory, 'bin'), prefix.bin)
+        install_tree(join_path(self.build_directory, 'lib'), prefix.lib)