diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use
index 6099e7c6a3..57d28f782d 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use
@@ -16,7 +16,6 @@ dev-lang/python		gdbm
 dev-libs/dbus-glib	tools
 dev-libs/elfutils	-utils
 dev-libs/openssl	pkcs11
-dev-util/perf		-perl -python
 net-misc/dhcp	        -server
 net-misc/ntp            caps
 sys-apps/smartmontools	-daemon -update-drivedb -systemd
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use.mask b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use.mask
deleted file mode 100644
index 0251dc5591..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use.mask
+++ /dev/null
@@ -1,2 +0,0 @@
-# Only needed by Catalyst in the SDK, requires dev-lang/python-exec.
-sys-apps/util-linux python
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/use.mask b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/use.mask
new file mode 100644
index 0000000000..a0ce76ef07
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/use.mask
@@ -0,0 +1,3 @@
+# Disable anything that pulls those interpreters into generic images.
+perl
+python