diff --git a/sys-libs/glibc/glibc-2.41-r8.ebuild b/sys-libs/glibc/glibc-2.41-r8.ebuild
index 331224630e150..3eaefb0c71b19 100644
--- a/sys-libs/glibc/glibc-2.41-r8.ebuild
+++ b/sys-libs/glibc/glibc-2.41-r8.ebuild
@@ -290,7 +290,8 @@ do_run_test() {
 
 	if [[ ${MERGE_TYPE} == "binary" ]] ; then
 		# ignore build failures when installing a binary package #324685
-		CFLAGS="-O2" LDFLAGS="" do_compile_test "" "$@" 2>/dev/null || return 0
+		CC="${glibc__ORIG_CC}" CXX="${glibc__ORIG_CXX}" CPP="${glibc__ORIG_CPP}" \
+			CFLAGS="-O2" LDFLAGS="" do_compile_test "" "$@" 2>/dev/null || return 0
 	else
 		ebegin "Performing simple compile test for ABI=${ABI}"
 		if ! do_compile_test "" "$@" ; then
diff --git a/sys-libs/glibc/glibc-2.42-r3.ebuild b/sys-libs/glibc/glibc-2.42-r3.ebuild
index cf9e901fc5846..257bc27b06e7a 100644
--- a/sys-libs/glibc/glibc-2.42-r3.ebuild
+++ b/sys-libs/glibc/glibc-2.42-r3.ebuild
@@ -295,7 +295,8 @@ do_run_test() {
 
 	if [[ ${MERGE_TYPE} == "binary" ]] ; then
 		# ignore build failures when installing a binary package #324685
-		do_compile_test "" "$@" 2>/dev/null || return 0
+		CC="${glibc__ORIG_CC}" CXX="${glibc__ORIG_CXX}" CPP="${glibc__ORIG_CPP}" \
+			CFLAGS="-O2" LDFLAGS="" do_compile_test "" "$@" 2>/dev/null || return 0
 	else
 		ebegin "Performing simple compile test for ABI=${ABI}"
 		if ! do_compile_test "" "$@" ; then
diff --git a/sys-libs/glibc/glibc-9999.ebuild b/sys-libs/glibc/glibc-9999.ebuild
index 390a559cb394c..0f471e718cb8a 100644
--- a/sys-libs/glibc/glibc-9999.ebuild
+++ b/sys-libs/glibc/glibc-9999.ebuild
@@ -297,7 +297,8 @@ do_run_test() {
 
 	if [[ ${MERGE_TYPE} == "binary" ]] ; then
 		# ignore build failures when installing a binary package #324685
-		CFLAGS="-O2" LDFLAGS="" do_compile_test "" "$@" 2>/dev/null || return 0
+		CC="${glibc__ORIG_CC}" CXX="${glibc__ORIG_CXX}" CPP="${glibc__ORIG_CPP}" \
+			CFLAGS="-O2" LDFLAGS="" do_compile_test "" "$@" 2>/dev/null || return 0
 	else
 		ebegin "Performing simple compile test for ABI=${ABI}"
 		if ! do_compile_test "" "$@" ; then