Correctly extend std_cmake_args

var/spack/repos/builtin/packages/visit/package.py

@@ -18,13 +18,12 @@ def install(self, spec, prefix):
         with working_dir('spack-build', create=True):
 
             feature_args = std_cmake_args[:]
-            feature_args = ["-DVTK_MAJOR_VERSION=6",
-                            "-DVTK_MINOR_VERSION=1",
-                            "-DCMAKE_INSTALL_PREFIX:PATH=%s" % spec.prefix,
-                            "-DVISIT_LOC_QMAKE_EXE:FILEPATH=%s/qmake-qt4" % spec['qt'].prefix.bin,
-                            "-DPYTHON_EXECUTABLE:FILEPATH=%s/python" % spec['python'].prefix.bin,
-                            "-DVISIT_SILO_DIR:PATH=%s" % spec['silo'].prefix,
-                            "-DVISIT_HDF5_DIR:PATH=%s" % spec['hdf5'].prefix]
+            feature_args.extend(["-DVTK_MAJOR_VERSION=6",
+                                 "-DVTK_MINOR_VERSION=1",
+                                 "-DVISIT_LOC_QMAKE_EXE:FILEPATH=%s/qmake-qt4" % spec['qt'].prefix.bin,
+                                 "-DPYTHON_EXECUTABLE:FILEPATH=%s/python" % spec['python'].prefix.bin,
+                                 "-DVISIT_SILO_DIR:PATH=%s" % spec['silo'].prefix,
+                                 "-DVISIT_HDF5_DIR:PATH=%s" % spec['hdf5'].prefix])
 
             cmake('../src', *feature_args)