diff --git a/Makefile b/Makefile
index 57e0ea9..67b9c17 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ ARCH := $(shell arch)
 OS_TYPE := $(shell uname)
 JB_OS_TYPE := $(shell uname | tr '[:upper:]' '[:lower:]')
 JSONNET := https://github.com/google/go-jsonnet/releases/download/v0.20.0/go-jsonnet_0.20.0_$(OS_TYPE)_$(ARCH).tar.gz
-JB = https://github.com/jsonnet-bundler/jsonnet-bundler/releases/latest/download/jb-$(JB_OS_TYPE)-$(ARCH)
+JB := https://github.com/jsonnet-bundler/jsonnet-bundler/releases/latest/download/jb-$(JB_OS_TYPE)-$(subst x86_64,amd64,$(ARCH))
 BINDIR = bin
 TEMPLATESDIR = templates
 OUTPUTDIR = rendered