diff --git a/third_party/Makefile.copying b/third_party/Makefile.copying
new file mode 100644
index 00000000..ee3ef011
--- /dev/null
+++ b/third_party/Makefile.copying
@@ -0,0 +1,8 @@
+
+copying: copying_third_party.h
+
+copying_third_party.h:
+	bin2c copying_third_party < COPYING-THIRD-PARTY > copying_third_party.h
+
+clean:
+	rm -f copying_third_party.h
diff --git a/third_party/README.md b/third_party/README.md
index dbce4f27..becd79c2 100644
--- a/third_party/README.md
+++ b/third_party/README.md
@@ -20,5 +20,5 @@ adding new third-party libraries.
 1. Install [adobe/bin2c](https://github.com/adobe/bin2c) to your development
    environment
 2. Write all third-party license terms to `COPYING-THIRD-PARTY`
-3. Run `make copying` to generate `copying_third_party.h`
+3. Run `make -f Makefile.copying` to generate `copying_third_party.h`
 4. Commit generated `copying_third_party.h`