diff --git a/deps/ox/Makefile b/deps/ox/Makefile
index a5c54554..96fd4412 100644
--- a/deps/ox/Makefile
+++ b/deps/ox/Makefile
@@ -2,11 +2,6 @@ OS=$(shell uname | tr [:upper:] [:lower:])
 HOST_ENV=${OS}-$(shell uname -m)
 DEVENV=devenv$(shell pwd | sed 's/\//-/g')
 DEVENV_IMAGE=wombatant/devenv
-ifneq ($(shell which gmake),)
-	MAKE=gmake -s
-else
-	MAKE=make -s
-endif
 ifneq ($(shell which docker 2>&1),)
 	ifeq ($(shell docker inspect --format="{{.State.Status}}" ${DEVENV} 2>&1),running)
 		ENV_RUN=docker exec -i -t --user $(shell id -u ${USER}) ${DEVENV}
@@ -14,17 +9,17 @@ ifneq ($(shell which docker 2>&1),)
 endif
 
 make:
-	${ENV_RUN} ${MAKE} -j -C build HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./scripts/run-make build
 preinstall:
-	${ENV_RUN} ${MAKE} -j -C build ARGS="preinstall" HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./scripts/run-make build preinstall
 install:
-	${ENV_RUN} ${MAKE} -j -C build ARGS="install" HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./scripts/run-make build install
 clean:
-	${ENV_RUN} ${MAKE} -j -C build ARGS="clean" HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./scripts/run-make build clean
 purge:
 	${ENV_RUN} rm -rf $(shell find build -mindepth 1 -maxdepth 1 -type d)
 test:
-	${ENV_RUN} ${MAKE} -j -C build ARGS="test" HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./scripts/run-make build test
 
 devenv:
 	docker pull ${DEVENV_IMAGE}
@@ -53,7 +48,7 @@ asan:
 	${ENV_RUN} rm -rf build/${HOST_ENV}-asan
 	${ENV_RUN} ./scripts/setup_build ${HOST_ENV} asan
 	${ENV_RUN} rm -f build/current
-	${ENV_RUN} ln -s ${HOST_ENV}-debug build/current
+	${ENV_RUN} ln -s ${HOST_ENV}-asan build/current
 
 windows:
 	${ENV_RUN} rm -rf build/windows
diff --git a/deps/ox/build/Makefile b/deps/ox/build/Makefile
deleted file mode 100644
index c18e1165..00000000
--- a/deps/ox/build/Makefile
+++ /dev/null
@@ -1,31 +0,0 @@
-all: gba_build native_build native_debug_build native_asan_build windows_release windows_debug
-
-gba_build:
-	@if [ -d gba-release ]; then \
-		cmake --build gba-release --target ${ARGS}; \
-	fi
-
-native_build:
-	@if [ -d ${HOST_ENV}-release ]; then \
-		cmake --build ${HOST_ENV}-release --target ${ARGS}; \
-	fi
-
-native_debug_build:
-	@if [ -d ${HOST_ENV}-debug ]; then \
-		cmake --build ${HOST_ENV}-debug --target ${ARGS}; \
-	fi
-
-native_asan_build:
-	@if [ -d ${HOST_ENV}-asan ]; then \
-		cmake --build ${HOST_ENV}-asan --target ${ARGS}; \
-	fi
-
-windows_release:
-	@if [ -d windows-release ]; then \
-		cmake --build windows-release --target ${ARGS}; \
-	fi
-
-windows_debug:
-	@if [ -d windows-debug ]; then \
-		cmake --build windows-debug --target ${ARGS}; \
-	fi
diff --git a/deps/ox/scripts/run-make b/deps/ox/scripts/run-make
new file mode 100755
index 00000000..072865b7
--- /dev/null
+++ b/deps/ox/scripts/run-make
@@ -0,0 +1,8 @@
+#! /usr/bin/env bash
+
+set -e
+
+for f in $(find $1 -maxdepth 1 -mindepth 1 -type d)
+do
+	cmake --build "$f" --target $2 --
+done