diff --git a/Ports/zlib/package.sh b/Ports/zlib/package.sh
index 03881cd6ba5..aaad451c82f 100755
--- a/Ports/zlib/package.sh
+++ b/Ports/zlib/package.sh
@@ -6,7 +6,8 @@ files="https://www.zlib.net/zlib-${version}.tar.gz zlib-${version}.tar.gz c3e5e9
 auth_type="sha256"
 
 configure() {
-    run ./configure
+    # Set uname to linux to prevent it finding the host's `libtool` on e.g. Darwin
+    run ./configure --uname=linux
 }
 
 install() {