diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9e87cd9..b612608 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -91,6 +91,8 @@ FortranCInterface_VERIFY()
 
 # Fortran module
 set(TREXIO_MOD_FILE ${CMAKE_SOURCE_DIR}/include/trexio_f.f90)
+# Export to parent scope so tests directory picks this up.
+set(TREXIO_MOD_FILE ${TREXIO_MOD_FILE} PARENT_SCOPE)
 # Add TREXIO Fortran module as a library.
 add_library(trexio_f SHARED)
 target_sources(trexio_f PUBLIC ${TREXIO_MOD_FILE})
@@ -114,10 +116,28 @@ if(TREXIO_DEVEL)
 	  ${TREXIO_PRIVATE_HEADERS}
 	  ${TREXIO_MOD_FILE}
       COMMAND ./build_trexio.sh
-      DEPENDS ${ORG_FILES}
+      DEPENDS ${ORG_FILES} ${CMAKE_SOURCE_DIR}/include/config.h
       WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/tools
       COMMENT "Generating TREXIO source code from org-mode files."
       VERBATIM)
+
+  set_source_files_properties(${TREXIO_SOURCES}
+                              ${TREXIO_PUBLIC_HEADERS}
+                              ${TREXIO_PRIVATE_HEADERS}
+                              ${TREXIO_MOD_FILE}
+                              PROPERTIES GENERATED TRUE)
+
+  add_custom_command(
+      OUTPUT ${CMAKE_SOURCE_DIR}/include/config.h
+      COMMAND bash -c "echo -e '#define TREXIO_PACKAGE_VERSION \"${PROJECT_VERSION}\"\\n#define TREXIO_VERSION_MAJOR ${PROJECT_VERSION_MAJOR}\\n#define TREXIO_VERSION_MINOR ${PROJECT_VERSION_MINOR}\\n#define TREXIO_VERSION_PATCH ${PROJECT_VERSION_PATCH}' > config.h"
+      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/include
+      COMMENT "Generates minimal include/config.h without using autotools."
+      VERBATIM)
+
+  set_source_files_properties(
+      ${CMAKE_SOURCE_DIR}/include/config.h
+      PROPERTIES GENERATED TRUE)
+
 endif()
 
 # ============= INSTALL TREXIO ============== 
diff --git a/src/templates_front/build.sh b/src/templates_front/build.sh
index 4d75e07..895dff4 100644
--- a/src/templates_front/build.sh
+++ b/src/templates_front/build.sh
@@ -12,10 +12,10 @@ VERSION_PATCH_VAL=`grep "VERSION_PATCH" ../../include/config.h | cut -d " " -f 3
 
 # grep some usefull constants from the config.h
 echo "" >> trexio.h
-echo "#define TREXIO_PACKAGE_VERSION ${VERSION_VAL}" >> trexio.h
-echo "#define TREXIO_VERSION_MAJOR ${VERSION_MAJOR_VAL}" >> trexio.h
-echo "#define TREXIO_VERSION_MINOR ${VERSION_MINOR_VAL}" >> trexio.h
-echo "#define TREXIO_VERSION_PATCH ${VERSION_PATCH_VAL}" >> trexio.h
+echo "#define TREXIO_PACKAGE_VERSION ${VERSION_VAL:='0.0.0'}" >> trexio.h
+echo "#define TREXIO_VERSION_MAJOR ${VERSION_MAJOR_VAL:=0}" >> trexio.h
+echo "#define TREXIO_VERSION_MINOR ${VERSION_MINOR_VAL:=0}" >> trexio.h
+echo "#define TREXIO_VERSION_PATCH ${VERSION_PATCH_VAL:=0}" >> trexio.h
 echo "" >> trexio.h
 
 cat prefix_s_front.h > trexio_s.h
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 94fe414..4af2ac1 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -44,4 +44,8 @@ endforeach()
 # Add Fortran test and link it with trexio_f (Fortran module) library.
 add_executable(test_f test_f.f90)
 target_link_libraries(test_f PRIVATE trexio_f)
+if(TREXIO_DEVEL)
+  set_source_files_properties(${TREXIO_MOD_FILE}
+                              PROPERTIES GENERATED TRUE)
+endif()
 add_test(NAME test_f COMMAND $<TARGET_FILE:test_f>)