diff --git a/.gitignore b/.gitignore
index e69de29..378eac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+build
diff --git a/Makefile b/Makefile
index 468d3a8..7ca8ae9 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,9 @@ all: $(DISTDIR)/$(JAR)
 clean:
 	$(RM) $(DISTDIR)/$(JAR) $(BUILDDIR)/*.class
 
-$(DISTDIR)/$(JAR): $(SRCDIR)/LenientHostnameVerifierAgent.java
+$(DISTDIR)/$(JAR): $(BUILDDIR)/LenientHostnameVerifierAgent.class
+	jar -cfm $@ $(SRCDIR)/manifest.txt -C $(BUILDDIR) .
+
+$(BUILDDIR)/LenientHostnameVerifierAgent.class: $(SRCDIR)/LenientHostnameVerifierAgent.java
+	mkdir -p build
 	javac -d $(BUILDDIR) $<
-	jar cfm $@ $(SRCDIR)/manifest.txt $(BUILDDIR)/*.class
diff --git a/build/.gitignore b/build/.gitignore
deleted file mode 100644
index d6b7ef3..0000000
--- a/build/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*
-!.gitignore
diff --git a/dist/LenientHostnameVerifierAgent.jar b/dist/LenientHostnameVerifierAgent.jar
index 71852db..d07ba2e 100644
Binary files a/dist/LenientHostnameVerifierAgent.jar and b/dist/LenientHostnameVerifierAgent.jar differ