diff --git a/appimage/kdevelop-recipe-centos6.sh b/appimage/kdevelop-recipe-centos6.sh
--- a/appimage/kdevelop-recipe-centos6.sh
+++ b/appimage/kdevelop-recipe-centos6.sh
@@ -32,7 +32,7 @@
 fi
 KF5_VERSION=v5.51.0
 KDE_PLASMA_VERSION=v5.13.4 # note: need libksysguard commit a0e69617442d720c76da5ebe3323e7a977929db4 (patch which makes plasma dep optional)
-KDE_APPLICATION_VERSION=v18.08.0
+KDE_APPLICATION_VERSION=v18.12.0
 GRANTLEE_VERSION=v5.1.0
 
 export LLVM_ROOT=/opt/llvm/
@@ -146,12 +146,14 @@
 
 function build_framework
 { (
-    build_project $1 $KF5_VERSION $2
+    PROJECT=$1
+    shift
+    build_project $PROJECT $KF5_VERSION $@
 ) }
 
 # KDE Frameworks
 if [ -z "$SKIP_FRAMEWORKS" ]; then
-build_framework extra-cmake-modules
+build_framework extra-cmake-modules -DBUILD_HTML_DOCS=OFF -DBUILD_MAN_DOCS=OFF
 
 build_framework kconfig
 build_framework kguiaddons
@@ -370,6 +372,13 @@
 rm -f ./usr/bin/obj2yaml ./usr/bin/yaml2obj
 rm -f ./usr/bin/kwrite ./usr/bin/kate
 
+# remove unused registration data
+rm -rf ./usr/share/applications/ || true
+
+# remove all appdata besides kdevelop one
+rm -f ./usr/share/metainfo/org.kde.{breezedark.desktop,kate,kwrite,konsole}.appdata.xml
+rm -f ./usr/share/metainfo/org.kde.kdev-{php,python}.metainfo.xml
+
 cp /kdevelop.appdir/usr/lib/libexec/kf5/* /kdevelop.appdir/usr/bin/
 
 cd /
@@ -435,7 +444,7 @@
 
 # Breeze cruft
 cp $BUILD/breeze-icons/icons/breeze-icons.rcc /kdevelop.appdir/usr/share/kdevelop/icontheme.rcc
-rm -Rf /kdevelop.appdir/usr/share/icons/breeze* # not needed because of the rcc
+rm -Rf /kdevelop.appdir/usr/share/icons/{B,b}reeze* # not needed because of the rcc
 rm -Rf /kdevelop.appdir/usr/share/wallpapers
 
 rm -f /kdevelop.appdir/usr/bin/llvm*