diff --git a/dev-ada/gprbuild/gprbuild-2020-r1.ebuild b/dev-ada/gprbuild/gprbuild-2020-r1.ebuild
index d3ee4019b2292..55116e70ff6f8 100644
--- a/dev-ada/gprbuild/gprbuild-2020-r1.ebuild
+++ b/dev-ada/gprbuild/gprbuild-2020-r1.ebuild
@@ -5,7 +5,7 @@ EAPI=7
 
 ADA_COMPAT=( gnat_201{7..9} gnat_2020 )
 
-inherit ada toolchain-funcs multiprocessing
+inherit ada multiprocessing
 
 MYP=${P}-20200429-19BD2-src
 XMLADA=xmlada-${PV}-20200429-19A99-src
diff --git a/dev-ada/gprbuild/gprbuild-2020.ebuild b/dev-ada/gprbuild/gprbuild-2020.ebuild
index dd6ac51b2faff..09a4684b639df 100644
--- a/dev-ada/gprbuild/gprbuild-2020.ebuild
+++ b/dev-ada/gprbuild/gprbuild-2020.ebuild
@@ -5,7 +5,7 @@ EAPI=7
 
 ADA_COMPAT=( gnat_201{7,8,9} )
 
-inherit ada toolchain-funcs multiprocessing
+inherit ada multiprocessing
 
 MYP=${P}-20200429-19BD2-src
 XMLADA=xmlada-${PV}-20200429-19A99-src
diff --git a/dev-ada/gprbuild/gprbuild-2021-r1.ebuild b/dev-ada/gprbuild/gprbuild-2021-r1.ebuild
index 9fae54f90be04..37e819ad26239 100644
--- a/dev-ada/gprbuild/gprbuild-2021-r1.ebuild
+++ b/dev-ada/gprbuild/gprbuild-2021-r1.ebuild
@@ -5,7 +5,7 @@ EAPI=7
 
 ADA_COMPAT=( gnat_202{0..1} )
 
-inherit ada toolchain-funcs multiprocessing
+inherit ada multiprocessing
 
 MYP=${P}-${PV}0519-19A34-src
 ID=23a77a37247ff811609e23a0a271f445c299fc8f