diff --git a/academic/CAPS_coevolution/CAPS_coevolution.SlackBuild b/academic/CAPS_coevolution/CAPS_coevolution.SlackBuild
index e18c9f2b26..fe93e4dc6e 100644
--- a/academic/CAPS_coevolution/CAPS_coevolution.SlackBuild
+++ b/academic/CAPS_coevolution/CAPS_coevolution.SlackBuild
@@ -30,14 +30,19 @@ BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
+# 2023-05-16 DW: add a real test
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) ARCH=i386 ;;
-    arm*) ARCH=arm ;;
+    i?86) ARCH=i586 ;;
        *) ARCH=$( uname -m ) ;;
   esac
 fi
 
+if [[ $ARCH != i?86 ]] && [ "$ARCH" != "x86_64" ]; then
+  printf "\n$ARCH is not supported... \n"
+  exit 1
+fi
+
 # If the variable PRINT_PACKAGE_NAME is set, then this script will report what
 # the name of the created package would be, and then exit. This information
 # could be useful to other scripts.
@@ -52,11 +57,6 @@ OUTPUT=${OUTPUT:-/tmp}
 
 set -e
 
-if [ "$ARCH" != "i386" ] && [ "$ARCH" != "x86_64" ]; then
-  printf "\n\n$ARCH is not supported... \n"
-  exit 1
-fi
-
 # The zipped names of the 32bit and 64bit versions differ too much, so
 # let's set them here.
 BINNAM=caps