diff --git a/.gitignore b/.gitignore
index 7da14c318b06..835098747abc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -177,7 +177,6 @@ apps/*/passes.txt
 apps/*/*.ll
 apps/*/*.sass
 apps/*/filter
-apps/interpolate/interpolate
 apps/seam_carving/seam_carving.h
 apps/snake/halide_snake
 apps/HelloAndroid*/bin
diff --git a/Makefile b/Makefile
index 0f926c6b1d16..f16b9583140c 100644
--- a/Makefile
+++ b/Makefile
@@ -1149,7 +1149,7 @@ test_apps: $(LIB_DIR)/libHalide.a $(BIN_DIR)/libHalide.$(SHARED_EXT) $(INCLUDE_D
 	make -C apps/local_laplacian clean  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
 	make -C apps/local_laplacian bin/out.png  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
 	make -C apps/interpolate clean  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
-	make -C apps/interpolate out.png  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
+	make -C apps/interpolate bin/out.png  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
 	make -C apps/blur clean  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
 	make -C apps/blur bin/test  HALIDE_BIN_PATH=$(CURDIR) HALIDE_SRC_PATH=$(ROOT_DIR)
 	apps/blur/bin/test
diff --git a/apps/interpolate/.gitignore b/apps/interpolate/.gitignore
deleted file mode 100644
index 7138f7baf9c0..000000000000
--- a/apps/interpolate/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-interpolate
-out.png
diff --git a/apps/interpolate/Makefile b/apps/interpolate/Makefile
index baffca2b9214..e730d775d82e 100644
--- a/apps/interpolate/Makefile
+++ b/apps/interpolate/Makefile
@@ -4,12 +4,13 @@ CXXFLAGS += -g -Wall
 
 .PHONY: clean
 
-interpolate: interpolate.cpp
-	$(CXX) $(CXXFLAGS) interpolate.cpp $(LIB_HALIDE) -o interpolate \
-	$(PNGFLAGS) $(LDFLAGS) $(LLVM_SHARED_LIBS)
+$(BIN)/interpolate: interpolate.cpp
+	@-mkdir -p $(BIN)
+	$(CXX) $(CXXFLAGS) interpolate.cpp $(LIB_HALIDE) -o $@ $(PNGFLAGS) $(LDFLAGS) $(LLVM_SHARED_LIBS)
 
-out.png: interpolate
-	./interpolate ../images/rgba.png out.png
+$(BIN)/out.png: $(BIN)/interpolate
+	@-mkdir -p $(BIN)
+	$^ $(IMAGES)/rgba.png $@
 
 clean:
-	rm -f interpolate interpolate.h out.png
+	rm -rf $(BIN)