diff --git a/dev-lang/yab/yab-1.7.8.recipe b/dev-lang/yab/yab-1.7.8.recipe
index c22fcbf4c..b70a65d85 100644
--- a/dev-lang/yab/yab-1.7.8.recipe
+++ b/dev-lang/yab/yab-1.7.8.recipe
@@ -1,13 +1,13 @@
 SUMMARY="Extended version of the yabasic programming language"
 DESCRIPTION="yab is an extended version of yabasic, a BASIC programming \
-language, with special commands designed for Haiku. "
+language, with special commands designed for Haiku."
 HOMEPAGE="http://software.besly.de/"
 COPYRIGHT="1995-2006 Marc-Oliver Ihm (yabasic)
 	2006-2009 Jan Bungeroth (yab)
 	2013-2018 Jim Saxton (yab improvements)
 	2018-2020 Lorenz Glaser (yab improvements)"
 LICENSE="Artistic"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://github.com/lorglas/yab/archive/$portVersion.tar.gz"
 CHECKSUM_SHA256="b14d31b4fae231cefe52cace918ee5341803e46d81c7b5c3e2aa939c8302a4fb"
 SOURCE_FILENAME="yab-$portVersion.tar.gz"
@@ -25,8 +25,16 @@ REQUIRES="
 	haiku
 	"
 
+PROVIDES_devel="
+	yab_devel = $portVersion
+	devel:yab = $portVersion
+	"
+REQUIRES_devel="
+	yab == $portVersion base
+	"
+
 BUILD_REQUIRES="
-	haiku_devel >= r1~alpha4_pm_hrev49976
+	haiku_devel
 	"
 BUILD_PREREQUIRES="
 	cmd:bison
@@ -39,6 +47,7 @@ BUILD()
 {
 	make
 }
+
 INSTALL()
 {
 	mkdir -p $binDir $libDir
@@ -52,4 +61,12 @@ INSTALL()
 	cp libyab* $libDir/
 	mkdir -p $dataDir/licenses/
 	cp data/licenses/* $dataDir/licenses/
+
+	mkdir -p $developDir/yab-$portVersion
+	cp *.c *.cpp *.h RdefApply yabasic.bison yabasic.flex \
+		$developDir/yab-$portVersion
+	chmod +x $developDir/yab-$portVersion/RdefApply
+
+	packageEntries devel \
+		$developDir
 }