diff --git a/.gitignore b/.gitignore
index 16baa60..9dc52c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ guix-commit.txt
 guix-installer-vm.img
 guix-installer-vm.tar
 guix-installer-vm.tar.xz
+guix-installer-vm.tar.xz.b64
 id_ed25519
 id_ed25519.pub
 signing-key.pub
diff --git a/Makefile b/Makefile
index 7b9623d..cac4d3b 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,9 @@ guix-installer-vm.tar: $(TARBALL_SOURCE)
 guix-installer-vm.tar.xz: guix-installer-vm.tar
 	xz -f -9e --verbose $<
 
+guix-installer-vm.tar.xz.b64: guix-installer-vm.tar.xz
+	base64 $< > $@
+
 IMAGE_SOURCE = \
 	$(TARBALL_SOURCE) \
 	guix-installer-vm.tar.xz