diff --git a/python/simulators/CMakeLists.txt b/python/simulators/CMakeLists.txt
index d04cddfb3..1f3521220 100644
--- a/python/simulators/CMakeLists.txt
+++ b/python/simulators/CMakeLists.txt
@@ -61,11 +61,10 @@ if(OPM_ENABLE_PYTHON_TESTS)
       -m unittest test/test_schedule.py)
 endif()
 
-
-set(_opm_common_dir "${opm-common_DIR}")
-if (NOT EXISTS "${_opm_common_dir}/python/install.py" )
+set(_opm_common_python_script_dir "${opm-common_DIR}/python")
+if (NOT EXISTS "${_opm_common_python_script_dir}/install.py" )
   # if the install.py script does not exist, assume that we are building against an installed opm-common
-  set(_opm_common_dir "${DEST_PREFIX}${CMAKE_INSTALL_PREFIX}/share/opm")
+  set(_opm_common_python_script_dir "${opm-common_PYTHON_COMMON_DIR}")
 endif()
 
 # NOTE: instead of using file( COPY ...) which copies the files at configure time (not at build time)
@@ -73,7 +72,7 @@ endif()
 #  update the files if they have been modified. We use the install.py script in opm-common, see also
 #  CMakeLists.txt in opm-common
 add_custom_target(copy_python ALL
-    COMMAND ${PYTHON_EXECUTABLE} ${_opm_common_dir}/python/install.py
+    COMMAND ${PYTHON_EXECUTABLE} "${_opm_common_python_script_dir}/install.py"
       ${PROJECT_SOURCE_DIR}/python ${PROJECT_BINARY_DIR} 0)
 
 # Since the installation of Python code is nonstandard it is protected by an
@@ -86,7 +85,7 @@ if (OPM_INSTALL_PYTHON)
   install(
     CODE "execute_process(
       COMMAND ${PYTHON_EXECUTABLE}
-              ${_opm_common_dir}/python/install.py
+              ${_opm_common_python_script_dir}/install.py
               ${PROJECT_BINARY_DIR}/python/opm2
               ${DEST_PREFIX}${CMAKE_INSTALL_PREFIX}/${PYTHON_INSTALL_PREFIX} 1)")
 endif()