diff --git a/libraries/lua-cjson/lua-cjson.SlackBuild b/libraries/lua-cjson/lua-cjson.SlackBuild
index 3f9b7799c6..8423875be8 100644
--- a/libraries/lua-cjson/lua-cjson.SlackBuild
+++ b/libraries/lua-cjson/lua-cjson.SlackBuild
@@ -22,11 +22,15 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# 20220422 bkw: Modified by SlackBuilds.org, BUILD=2:
+# - strip shared library.
+# - actually use SLKCFLAGS.
+
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=lua-cjson
 VERSION=${VERSION:-2.1.0}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -38,9 +42,6 @@ if [ -z "$ARCH" ]; then
   esac
 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.
 if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
   echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
   exit 0
@@ -75,17 +76,16 @@ cd $PRGNAM-$VERSION
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
-  -o -perm 511 \) -exec chmod 755 {} \; -o \
+  -o -perm 511 \) -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
-  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
+
+sed -i "/^CFLAGS/s,-O3,$SLKCFLAGS," Makefile
 
 make
 
-find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
-  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
-
 mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/lua/5.1
-cp -a cjson.so $PKG/usr/lib${LIBDIRSUFFIX}/lua/5.1
+install -s -m0755 cjson.so $PKG/usr/lib${LIBDIRSUFFIX}/lua/5.1
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a \