Update eessi_environment_variables

Author: ocaisa

init/eessi_environment_variables

@@ -67,7 +67,7 @@ if [ -d $EESSI_PREFIX ]; then
               EESSI_ACCEL_SOFTWARE_SUBDIR=${EESSI_ACCEL_SOFTWARE_SUBDIR_OVERRIDE:-$EESSI_SOFTWARE_SUBDIR}
               # path to where accel/* subdirectory is located
               EESSI_ACCEL_SOFTWARE_PATH=${EESSI_PREFIX}/software/${EESSI_OS_TYPE}/${EESSI_ACCEL_SOFTWARE_SUBDIR}
-              if [ -d $EESSI_ACCEL_SOFTWARE_PATH/${EESSI_ACCEL_SUBDIR} ]; then
+              if [ ! -d $EESSI_ACCEL_SOFTWARE_PATH/${EESSI_ACCEL_SUBDIR} ]; then
                   # We should try to use the fallback compute capability
                   show_msg "archdetect found no supported accelerator ${EESSI_ACCEL_SUBDIR}, falling back to ${EESSI_ACCEL_SUBDIR::-1}0"
                   EESSI_ACCEL_SUBDIR="${EESSI_ACCEL_SUBDIR::-1}0"