diff --git a/dev-java/openjdk/openjdk-11.0.18_p10.ebuild b/dev-java/openjdk/openjdk-11.0.18_p10.ebuild
index 8f67061d2ac5d..f3b187b7fef1d 100644
--- a/dev-java/openjdk/openjdk-11.0.18_p10.ebuild
+++ b/dev-java/openjdk/openjdk-11.0.18_p10.ebuild
@@ -243,6 +243,10 @@ src_configure() {
 }
 
 src_compile() {
+	# Too brittle - gets confused by e.g. -Oline
+	unset GNUMAKEFLAGS
+	export MAKEOPTS="-j$(makeopts_jobs) -l$(makeopts_loadavg)"
+
 	local myemakeargs=(
 		JOBS=$(makeopts_jobs)
 		LOG=debug
diff --git a/dev-java/openjdk/openjdk-17.0.6_p10-r1.ebuild b/dev-java/openjdk/openjdk-17.0.6_p10-r1.ebuild
index 1a2fcdf2672ea..dcc0a6301e0d2 100644
--- a/dev-java/openjdk/openjdk-17.0.6_p10-r1.ebuild
+++ b/dev-java/openjdk/openjdk-17.0.6_p10-r1.ebuild
@@ -260,6 +260,10 @@ src_configure() {
 }
 
 src_compile() {
+	# Too brittle - gets confused by e.g. -Oline
+	unset GNUMAKEFLAGS
+	export MAKEOPTS="-j$(makeopts_jobs) -l$(makeopts_loadavg)"
+
 	local myemakeargs=(
 		JOBS=$(makeopts_jobs)
 		LOG=debug
diff --git a/dev-java/openjdk/openjdk-17.0.6_p10.ebuild b/dev-java/openjdk/openjdk-17.0.6_p10.ebuild
index 328018b6e7c84..7218bafd66572 100644
--- a/dev-java/openjdk/openjdk-17.0.6_p10.ebuild
+++ b/dev-java/openjdk/openjdk-17.0.6_p10.ebuild
@@ -258,6 +258,10 @@ src_configure() {
 }
 
 src_compile() {
+	# Too brittle - gets confused by e.g. -Oline
+	unset GNUMAKEFLAGS
+	export MAKEOPTS="-j$(makeopts_jobs) -l$(makeopts_loadavg)"
+
 	local myemakeargs=(
 		JOBS=$(makeopts_jobs)
 		LOG=debug
diff --git a/dev-java/openjdk/openjdk-8.362_p09.ebuild b/dev-java/openjdk/openjdk-8.362_p09.ebuild
index 2da4bca4fce13..86ca94ebf8cde 100644
--- a/dev-java/openjdk/openjdk-8.362_p09.ebuild
+++ b/dev-java/openjdk/openjdk-8.362_p09.ebuild
@@ -178,6 +178,10 @@ src_configure() {
 }
 
 src_compile() {
+	# Too brittle - gets confused by e.g. -Oline
+	unset GNUMAKEFLAGS
+	export MAKEOPTS="-j$(makeopts_jobs) -l$(makeopts_loadavg)"
+
 	local myemakeargs=(
 		JOBS=$(makeopts_jobs)
 		LOG=debug