diff --git a/sci-visualization/gnuplot/gnuplot-5.0.7.recipe b/sci-visualization/gnuplot/gnuplot-5.0.7.recipe
deleted file mode 100644
index fe7807685..000000000
--- a/sci-visualization/gnuplot/gnuplot-5.0.7.recipe
+++ /dev/null
@@ -1,106 +0,0 @@
-SUMMARY="Command-line driven graphing utility"
-DESCRIPTION="Originally created to allow both students and scientists to \
-visualize mathematical functions and data interactively, but has grown to \
-support many non-interactive uses such as web scripting. It is also used \
-as a plotting engine by third-party applications like Octave."
-HOMEPAGE="http://www.gnuplot.info/"
-COPYRIGHT="1986-1993, 1998, 2004-2018 Thomas Williams, Colin Kelley"
-LICENSE="Gnuplot"
-REVISION="3"
-SOURCE_URI="https://downloads.sourceforge.net/gnuplot/gnuplot-$portVersion.tar.gz"
-CHECKSUM_SHA256="0ad760ff013b4a9cf29853fa9b50c50030a33cd8fb86220a23abb466655136fc"
-
-ARCHITECTURES="!x86_gcc2 x86 x86_64"
-SECONDARY_ARCHITECTURES="x86"
-
-commandSuffix=$secondaryArchSuffix
-commandBinDir=$binDir
-if [ "$targetArchitecture" = x86_gcc2 ]; then
-	commandSuffix=
-	commandBinDir=$prefix/bin
-fi
-
-PROVIDES="
-	gnuplot$secondaryArchSuffix = $portVersion
-	cmd:gnuplot$commandSuffix = $portVersion
-	"
-REQUIRES="
-	haiku$secondaryArchSuffix
-	lib:libfontconfig$secondaryArchSuffix
-	lib:libfreetype$secondaryArchSuffix
-	lib:libgd$secondaryArchSuffix
-	lib:libGL$secondaryArchSuffix
-	lib:libiconv$secondaryArchSuffix
-	lib:libjpeg$secondaryArchSuffix
-	lib:libncurses$secondaryArchSuffix
-	lib:libpng16$secondaryArchSuffix
-	lib:libQt5Core$secondaryArchSuffix
-	lib:libQt5Gui$secondaryArchSuffix
-	lib:libQt5Network$secondaryArchSuffix
-	lib:libQt5PrintSupport$secondaryArchSuffix
-	lib:libQt5Svg$secondaryArchSuffix
-	lib:libQt5Widgets$secondaryArchSuffix
-	lib:libreadline$secondaryArchSuffix
-	lib:libtiff$secondaryArchSuffix
-	lib:libvpx$secondaryArchSuffix >= 5
-	lib:libz$secondaryArchSuffix
-	"
-
-BUILD_REQUIRES="
-	haiku${secondaryArchSuffix}_devel
-	devel:libcairo$secondaryArchSuffix
-#	devel:libcerf$secondaryArchSuffix
-	devel:libGL$secondaryArchSuffix
-	devel:libgd$secondaryArchSuffix
-	devel:libjpeg$secondaryArchSuffix
-#	devel:libpango_1.0$secondaryArchSuffix
-	devel:libQt5Core$secondaryArchSuffix
-	devel:libQt5Gui$secondaryArchSuffix
-	devel:libQt5Network$secondaryArchSuffix
-	devel:libQt5PrintSupport$secondaryArchSuffix
-	devel:libQt5Svg$secondaryArchSuffix
-	devel:libQt5Widgets$secondaryArchSuffix
-	devel:libreadline$secondaryArchSuffix
-	devel:libvpx$secondaryArchSuffix >= 5
-	devel:libz$secondaryArchSuffix
-	"
-BUILD_PREREQUIRES="
-	cmd:aclocal
-	cmd:automake
-	cmd:autoconf
-	cmd:awk
-	cmd:cmp
-	cmd:gcc$secondaryArchSuffix
-	cmd:gdlib_config$secondaryArchSuffix
-	cmd:ld$secondaryArchSuffix
-	cmd:make
-	cmd:pkg_config$secondaryArchSuffix
-	"
-
-PATCH()
-{
-	sed -i 's/-rdynamic/-Wl,-export-dynamic/g' demo/plugin/Makefile.am
-	sed -i 's/isnan/std::isnan/g' src/qtterminal/qt_conversion.cpp
-}
-
-BUILD()
-{
-	export CXXFLAGS="-std=c++11"
-	aclocal
-	automake
-	runConfigure --omit-dirs binDir ./configure --bindir="$commandBinDir" \
-		--without-cairo \
-		--with-qt \
-
-	make $jobArgs
-}
-
-INSTALL()
-{
-	make install-strip
-}
-
-TEST()
-{
-	make check
-}
diff --git a/sci-visualization/gnuplot/gnuplot-5.2.5.recipe b/sci-visualization/gnuplot/gnuplot-5.2.5.recipe
index 6021518f6..40a3bf19f 100644
--- a/sci-visualization/gnuplot/gnuplot-5.2.5.recipe
+++ b/sci-visualization/gnuplot/gnuplot-5.2.5.recipe
@@ -6,7 +6,7 @@ as a plotting engine by third-party applications like Octave."
 HOMEPAGE="http://www.gnuplot.info/"
 COPYRIGHT="1986-1993, 1998, 2004-2018 Thomas Williams, Colin Kelley"
 LICENSE="Gnuplot"
-REVISION="4"
+REVISION="6"
 SOURCE_URI="https://downloads.sourceforge.net/gnuplot/gnuplot-$portVersion.tar.gz"
 CHECKSUM_SHA256="039db2cce62ddcfd31a6696fe576f4224b3bc3f919e66191dfe2cdb058475caa"
 
@@ -35,7 +35,7 @@ REQUIRES="
 	lib:libpng16$secondaryArchSuffix
 	lib:libreadline$secondaryArchSuffix
 	lib:libtiff$secondaryArchSuffix
-	lib:libvpx$secondaryArchSuffix >= 5
+	lib:libvpx$secondaryArchSuffix
 	lib:libz$secondaryArchSuffix
 	"
 
@@ -47,7 +47,7 @@ BUILD_REQUIRES="
 	devel:libjpeg$secondaryArchSuffix
 #	devel:libpango_1.0$secondaryArchSuffix
 	devel:libreadline$secondaryArchSuffix >= 8
-	devel:libvpx$secondaryArchSuffix >= 5
+	devel:libvpx$secondaryArchSuffix
 	devel:libz$secondaryArchSuffix
 	"
 BUILD_PREREQUIRES="