diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5f1a726a..9d66ad9e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,6 +12,7 @@ jobs:
 
     - name: install-netcdf
       run: |
+        sudo apt-get update
         sudo apt-get install libnetcdf-dev libnetcdff-dev netcdf-bin pkg-config         
 
     - name: install-mpi
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index af5847e9..09cdcacf 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,19 +1,23 @@
 include("list_of_files.cmake")
 
 if(CMAKE_Fortran_COMPILER_ID MATCHES "^(Intel)$")
-  set(CMAKE_Fortran_FLAGS "-g -traceback -fixed")
+  set(CMAKE_Fortran_FLAGS "-g -traceback -fixed ${CMAKE_Fortran_FLAGS}")
   set(CMAKE_Fortran_FLAGS_RELEASE "-O2")
   set(fortran_d_flags "-r8")
   set(fortran_8_flags "-i8 -r8")
-elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
+elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
   set(CMAKE_Fortran_FLAGS
-      "-g -fno-range-check -fbacktrace -funroll-loops -ffixed-form")
+      "-g -fno-range-check -fbacktrace -funroll-loops -ffixed-form ${CMAKE_Fortran_FLAGS}")
   set(CMAKE_Fortran_FLAGS_RELEASE "-O2")
   set(CMAKE_Fortran_FLAGS_DEBUG "-ggdb -Wall")
   set(fortran_d_flags "-fdefault-real-8")
   set(fortran_8_flags "-fdefault-integer-8 -fdefault-real-8")
 endif()
 
+if(${CMAKE_Fortran_COMPILER_ID} MATCHES "^(GNU)$" AND ${CMAKE_Fortran_COMPILER_VERSION} VERSION_GREATER_EQUAL 10)
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -w -fallow-argument-mismatch -fallow-invalid-boz")
+endif()
+ 
 set(kinds "4" "8" "d")
 foreach(kind ${kinds})
   set(lib_name ${PROJECT_NAME}_${kind})