diff --git a/audio/foo-yc20/doinst.sh b/audio/foo-yc20/doinst.sh
index 4e8ba7071d..3e5691a052 100644
--- a/audio/foo-yc20/doinst.sh
+++ b/audio/foo-yc20/doinst.sh
@@ -2,3 +2,8 @@ if [ -x /usr/bin/update-desktop-database ]; then
   /usr/bin/update-desktop-database -q usr/share/applications >/dev/null 2>&1
 fi
 
+if [ -e usr/share/icons/hicolor/icon-theme.cache ]; then
+  if [ -x /usr/bin/gtk-update-icon-cache ]; then
+    /usr/bin/gtk-update-icon-cache usr/share/icons/hicolor >/dev/null 2>&1
+  fi
+fi
diff --git a/audio/foo-yc20/foo-yc20.SlackBuild b/audio/foo-yc20/foo-yc20.SlackBuild
index 65750f850a..efc1dc7169 100644
--- a/audio/foo-yc20/foo-yc20.SlackBuild
+++ b/audio/foo-yc20/foo-yc20.SlackBuild
@@ -6,6 +6,7 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20211129 bkw: BUILD=3, new-style icons.
 # 20170621 bkw: Rework optimization options. Needed because -current's
 # gcc7 requires massive amounts of memory to build this.
 
@@ -13,7 +14,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=foo-yc20
 VERSION=${VERSION:-1.3.0}
-BUILD=${BUILD:-2}
+BUILD=${BUILD:-3}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -25,9 +26,6 @@ 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
@@ -60,11 +58,8 @@ rm -rf $PRGNAM-$VERSION
 tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
 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 \
- \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
- -exec chmod 644 {} \;
+find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
+        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+
 
 sed -i "s,\<lib\>,lib$LIBDIRSUFFIX,g" Makefile
 
@@ -82,10 +77,21 @@ esac
 
 make install DESTDIR=$PKG PREFIX=/usr
 
-# make the .desktop file pass desktop-file-validate
+for px in 16 32 48 64 128; do
+  size=${px}x${px}
+  dir=$PKG/usr/share/icons/hicolor/$size/apps
+  mkdir -p $dir
+  convert -resize $size $CWD/$PRGNAM.png $dir/$PRGNAM.png
+done
+
+mkdir -p $PKG/usr/share/pixmaps
+ln -s ../icons/hicolor/48x48/apps/$PRGNAM.png $PKG/usr/share/pixmaps/$PRGNAM.png
+
+# make the .desktop file pass desktop-file-validate, and use our icon.
 sed -i \
   -e '/^Encoding/d' \
   -e '/^Categories/s/$/;/' \
+  -e '/^Icon/s,=.*,='$PRGNAM',' \
   $PKG/usr/share/applications/$PRGNAM.desktop
 
 strip $PKG/usr/bin/* $PKG/usr/lib$LIBDIRSUFFIX/lv2/$PRGNAM.lv2/*.so
diff --git a/audio/foo-yc20/foo-yc20.png b/audio/foo-yc20/foo-yc20.png
new file mode 100644
index 0000000000..a36bf6925a
Binary files /dev/null and b/audio/foo-yc20/foo-yc20.png differ