diff -urN pastix.orig/CMakeLists.txt pastix/CMakeLists.txt
--- pastix.orig/CMakeLists.txt	2021-04-19 20:21:34.300303200 +0200
+++ pastix/CMakeLists.txt	2021-04-19 20:22:51.998513000 +0200
@@ -138,7 +138,7 @@
 option(PASTIX_ORDERING_SCOTCH
   "Enable Scotch Ordering" ON)
 option(PASTIX_ORDERING_METIS
-  "Enable Metis ordering"  OFF)
+  "Enable Metis ordering" OFF)
 cmake_dependent_option(PASTIX_ORDERING_PTSCOTCH
   "Activate the PT-scotch ordering (requires PASTIX_ORDERING_SCOTCH)" OFF
   "PASTIX_WITH_MPI;PASTIX_ORDERING_SCOTCH" OFF)
@@ -348,7 +348,7 @@
 endif()
 
 if (PASTIX_ORDERING_SCOTCH)
-  find_package(SCOTCH)
+  find_package(SCOTCH REQUIRED)
 
   if (SCOTCH_FOUND)
     cmake_dependent_option(PASTIX_ORDERING_SCOTCH_MT
@@ -368,7 +368,7 @@
 # PaStiX might depend on Metis/ParMetis
 #--------------------------------------
 if (PASTIX_ORDERING_METIS)
-  find_package(METIS)
+  find_package(METIS REQUIRED)
 
   if (METIS_FOUND)
     # Check coherency for integer size
diff -urN pastix.orig/cmake_modules/morse_cmake/modules/find/FindMETIS.cmake pastix/cmake_modules/morse_cmake/modules/find/FindMETIS.cmake
--- pastix.orig/cmake_modules/morse_cmake/modules/find/FindMETIS.cmake	2021-04-19 20:21:34.708067800 +0200
+++ pastix/cmake_modules/morse_cmake/modules/find/FindMETIS.cmake	2021-04-19 20:26:47.109556000 +0200
@@ -74,16 +74,14 @@
 # check a function to validate the find
 if(METIS_LIBRARIES)
 
-  # check if static or dynamic lib
-  morse_check_static_or_dynamic(METIS METIS_LIBRARIES)
-  if(METIS_STATIC)
-    set(STATIC "_STATIC")
-  else()
-    set(STATIC "")
+  # Metis may depend on the M library and the static compilation does
+  # not include the dependency, so we enforce it
+  find_package(M QUIET)
+  if ( M_FOUND )
+    set( METIS_LIBRARIES "${METIS_LIBRARIES};${M_LIBRARIES}" )
   endif()
 
-  # set required libraries for link
-  morse_set_required_test_lib_link(METIS)
+  morse_cmake_required_set(METIS)
 
   # test link
   unset(METIS_WORKS CACHE)
@@ -100,9 +98,7 @@
       message(STATUS "Check in CMakeFiles/CMakeError.log to figure out why it fails")
     endif()
   endif()
-  set(CMAKE_REQUIRED_INCLUDES)
-  set(CMAKE_REQUIRED_FLAGS)
-  set(CMAKE_REQUIRED_LIBRARIES)
+  morse_cmake_required_unset()
 
   list(GET METIS_LIBRARIES 0 first_lib)
   get_filename_component(first_lib_path "${first_lib}" DIRECTORY)
@@ -120,13 +116,15 @@
 
 endif(METIS_LIBRARIES)
 
-# Check the size of METIS_Idx
-# ---------------------------------
-set(CMAKE_REQUIRED_INCLUDES ${METIS_INCLUDE_DIRS})
 
-include(CheckCSourceRuns)
-#stdio.h and stdint.h should be included by metis.h directly
-set(METIS_C_TEST_METIS_Idx_4 "
+if (METIS_WORKS)
+  morse_cmake_required_set(METIS)
+
+  # Check the size of METIS_Idx
+  # ---------------------------------
+  include(CheckCSourceRuns)
+  #stdio.h and stdint.h should be included by metis.h directly
+  set(METIS_C_TEST_METIS_Idx_4 "
 #include <stdio.h>
 #include <stdint.h>
 #include <metis.h>
@@ -138,7 +136,7 @@
 }
 ")
 
-set(METIS_C_TEST_METIS_Idx_8 "
+  set(METIS_C_TEST_METIS_Idx_8 "
 #include <stdio.h>
 #include <stdint.h>
 #include <metis.h>
@@ -149,20 +147,22 @@
     return 1;
 }
 ")
-unset(METIS_Idx_4 CACHE)
-unset(METIS_Idx_8 CACHE)
-check_c_source_runs("${METIS_C_TEST_METIS_Idx_4}" METIS_Idx_4)
-check_c_source_runs("${METIS_C_TEST_METIS_Idx_8}" METIS_Idx_8)
-if(NOT METIS_Idx_4)
-  if(NOT METIS_Idx_8)
-    set(METIS_INTSIZE -1)
+  unset(METIS_Idx_4 CACHE)
+  unset(METIS_Idx_8 CACHE)
+  check_c_source_runs("${METIS_C_TEST_METIS_Idx_4}" METIS_Idx_4)
+  check_c_source_runs("${METIS_C_TEST_METIS_Idx_8}" METIS_Idx_8)
+  if(NOT METIS_Idx_4)
+    if(NOT METIS_Idx_8)
+      set(METIS_INTSIZE -1)
+    else()
+      set(METIS_INTSIZE 8)
+    endif()
   else()
-    set(METIS_INTSIZE 8)
+    set(METIS_INTSIZE 4)
   endif()
-else()
-  set(METIS_INTSIZE 4)
+
+  morse_cmake_required_unset()
 endif()
-set(CMAKE_REQUIRED_INCLUDES "")
 
 # check that METIS has been found
 # ---------------------------------