diff --git a/dev-ada/gtkada/files/gtkada-2021-uninstall.patch b/dev-ada/gtkada/files/gtkada-2021-uninstall.patch
new file mode 100644
index 0000000000000..c782aac633b7a
--- /dev/null
+++ b/dev-ada/gtkada/files/gtkada-2021-uninstall.patch
@@ -0,0 +1,13 @@
+--- a/Makefile.in	2021-12-27 09:42:14.575136019 +0100
++++ b/Makefile.in	2021-12-27 09:42:31.159870381 +0100
+@@ -113,10 +113,6 @@
+ endif
+ 
+ install-clean:
+-ifneq (,$(wildcard $(prefix)/lib/gnat/manifests/gtkada))
+-	-$(GPRINSTALL) --uninstall -f --prefix=$(prefix) \
+-		--project-subdir=lib/gnat gtkada
+-endif
+ 
+ install: install-clean
+ 	${GPRINSTALL_FULL} -XLIBRARY_TYPE=$(LIBRARY_TYPE_FOR_TOOLS) \
diff --git a/dev-ada/gtkada/gtkada-2021.ebuild b/dev-ada/gtkada/gtkada-2021.ebuild
index da08ed425283b..1005a7ba10341 100644
--- a/dev-ada/gtkada/gtkada-2021.ebuild
+++ b/dev-ada/gtkada/gtkada-2021.ebuild
@@ -39,6 +39,7 @@ S="${WORKDIR}"/${MYP}
 PATCHES=(
 	"${FILESDIR}"/${PN}-2017-r1-gentoo.patch
 	"${FILESDIR}"/${PN}-2019-gentoo.patch
+	"${FILESDIR}"/${P}-uninstall.patch
 )
 
 src_prepare() {
diff --git a/dev-ada/gtkada/gtkada-22.0.0.ebuild b/dev-ada/gtkada/gtkada-22.0.0.ebuild
index 8a1efe2e0af38..6cb33f81492e2 100644
--- a/dev-ada/gtkada/gtkada-22.0.0.ebuild
+++ b/dev-ada/gtkada/gtkada-22.0.0.ebuild
@@ -33,6 +33,7 @@ REQUIRED_USE="${ADA_REQUIRED_USE}"
 PATCHES=(
 	"${FILESDIR}"/${PN}-2017-r1-gentoo.patch
 	"${FILESDIR}"/${PN}-2019-gentoo.patch
+	"${FILESDIR}"/${PN}-2021-uninstall.patch
 )
 
 src_prepare() {