diff --git a/graphics/oyranos/README b/graphics/oyranos/README
index 0731c147fe..59dddcf6cd 100644
--- a/graphics/oyranos/README
+++ b/graphics/oyranos/README
@@ -1,11 +1,11 @@
-Oyranos is a Colour Management System (CMS) on operating system level. It
-allows to match predictably input device colours to output device colours
-accross supporting applications. One goal is to make colour management
-useful for all users in a automated fashion and regardless of any technical
-knowledge.
+Oyranos is a Colour Management System (CMS) on operating system
+level. It allows to match predictably input device colours to output
+device colours accross supporting applications. One goal is to make
+colour management useful for all users in a automated fashion and
+regardless of any technical knowledge.
 
-Oyranos is based one the well established ICC standard and various other
-specifications. System wide settings in Oyranos shall enshure consistency
-in a portable fashion. Oyranos will provide in the future a Colour Matching
-Module (CMM) framework. Users can then transparently select a desired
-colour engine.
+Oyranos is based one the well established ICC standard and various
+other specifications. System wide settings in Oyranos shall enshure
+consistency in a portable fashion. Oyranos will provide in the future
+a Colour Matching Module (CMM) framework. Users can then transparently
+select a desired colour engine.
diff --git a/graphics/oyranos/oyranos.SlackBuild b/graphics/oyranos/oyranos.SlackBuild
index 2c9aa2fbde..cbb6a7895e 100644
--- a/graphics/oyranos/oyranos.SlackBuild
+++ b/graphics/oyranos/oyranos.SlackBuild
@@ -23,11 +23,18 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# 20220222 bkw: Modified by SlackBuilds.org, BUILD=2:
+# - fix build on 15.0.
+# - add qt4 dependency.
+# - use cmake directly, instead of fake configure script.
+# - stop trying to build one of the examples with qt5 (it fails).
+# - don't build with fltk, if installed (it fails).
+
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=oyranos
 VERSION=${VERSION:-0.9.6}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -39,9 +46,6 @@ 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.$PKGTYPE"
   exit 0
@@ -51,6 +55,8 @@ TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
+# 20220225 bkw: These flags get used, but cmake puts a "-O3" right
+# after them, meaning the -O2 is ignored. Not going to fix.
 if [ "$ARCH" = "i586" ]; then
   SLKCFLAGS="-O2 -march=i586 -mtune=i686"
   LIBDIRSUFFIX=""
@@ -67,6 +73,8 @@ fi
 
 set -e
 
+export PATH=/usr/lib$LIBDIRSUFFIX/qt4/bin:$PATH
+
 rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
@@ -76,33 +84,38 @@ 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 {} \+
 
-CFLAGS="$SLKCFLAGS" \
-CXXFLAGS="$SLKCFLAGS" \
-./configure \
-  --prefix=/usr \
-  --libdir=/usr/lib${LIBDIRSUFFIX} \
-  --sysconfdir=/etc \
-  --localstatedir=/var \
-  --mandir=/usr/man \
-  --docdir=/usr/doc/$PRGNAM-$VERSION \
-  --build=$ARCH-slackware-linux
+# The qcmsevents tool supposedly can be built with qt5, but it
+# fails (wrong qt5 version probably). Force it to use qt4.
+sed -i '/FIND_PACKAGE(Qt5/d' src/tools/qcmsevents/CMakeLists.txt
 
-make
-make install DESTDIR=$PKG
+# The build fails if fltk is installed, one of the example programs
+# fails to compile. So, do without it.
+sed -i '/IF/s,FLTK_FOUND,FALSE,' src/examples/CMakeLists.txt
 
-find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
-  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+mkdir -p build
+cd build
+  cmake \
+    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
+    -DMAN_INSTALL_DIR=/usr/man \
+    -DCMAKE_BUILD_TYPE=Release ..
+  make VERBOSE=1
+  make install/strip DESTDIR=$PKG
+cd ..
 
 mv $PKG/usr/share/man $PKG/usr
-find $PKG/usr/man -type f -exec gzip -9 {} \;
-for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+gzip -9 $PKG/usr/man/man*/*
 
+# 20220225 bkw: does an empty BUGS file count as a bug? or just a
+# statement of extreme confidence?
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
-cp -a AUTHORS.md BUGS COPYING.md README.md PACKAGING.md \
+cp -a AUTHORS.md COPYING.md README.md \
     $PKG/usr/doc/$PRGNAM-$VERSION
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
diff --git a/graphics/oyranos/oyranos.info b/graphics/oyranos/oyranos.info
index c2d938317d..b5d69f1bce 100644
--- a/graphics/oyranos/oyranos.info
+++ b/graphics/oyranos/oyranos.info
@@ -5,6 +5,6 @@ DOWNLOAD="https://github.com/oyranos-cms/oyranos/archive/0.9.6/oyranos-0.9.6.tar
 MD5SUM="2a8c9783f762906ba7ff9ef43612041f"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
-REQUIRES=""
+REQUIRES="qt4"
 MAINTAINER="Dimitris Zlatanidis"
 EMAIL="d.zlatanidis@gmail.com"