diff --git a/Makefile.darwin b/Makefile.darwin
index 4786657..9ff916c 100644
--- a/Makefile.darwin
+++ b/Makefile.darwin
@@ -30,7 +30,7 @@ install.dependencies: install.os install.lima-dependencies install.lima-socket-v
 install.os: $(OS_OUTDIR)/$(FINCH_OS_BASENAME)
 
 $(OS_OUTDIR)/$(FINCH_OS_BASENAME): $(OS_OUTDIR) $(CURDIR)/deps/full-os.conf
-	bash deps/install.sh --output $@ $(CURDIR)/deps/full-os.conf
+	bash deps/install.sh --arch $(ARCH) --output $@ $(CURDIR)/deps/full-os.conf
 
 .PHONY: install.lima-dependencies
 install.lima-dependencies: download.lima-dependencies $(LIMA_OUTDIR)
@@ -40,7 +40,7 @@ install.lima-dependencies: download.lima-dependencies $(LIMA_OUTDIR)
 download.lima-dependencies: $(LIMA_DOWNLOAD_DIR)/$(LIMA_DEPENDENCY_FILE_NAME)
 
 $(LIMA_DOWNLOAD_DIR)/$(LIMA_DEPENDENCY_FILE_NAME): $(LIMA_DOWNLOAD_DIR) $(CURDIR)/deps/lima-bundles.conf
-	bash deps/install.sh --output $@ $(CURDIR)/deps/lima-bundles.conf
+	bash deps/install.sh --arch $(ARCH) --output $@ $(CURDIR)/deps/lima-bundles.conf
 
 .PHONY: install.lima-socket-vmnet
 install.lima-socket-vmnet:
diff --git a/deps/install.sh b/deps/install.sh
index 32a5bbd..9dc9ff9 100644
--- a/deps/install.sh
+++ b/deps/install.sh
@@ -13,6 +13,7 @@ CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_ROOT="$(cd -- "${CURRENT_DIR}/.." && pwd)"
 
 file=""
+arch=""
 sources=""
 
 while [[ $# -gt 0 ]]; do
@@ -22,6 +23,11 @@ while [[ $# -gt 0 ]]; do
       file=$1
       shift # past value
       ;;
+    --arch|-a)
+      shift # past argument
+      arch=$1
+      shift # past value
+      ;;
     --*|-*)
       echo "error: unknown option $1"
       exit 1
@@ -44,7 +50,6 @@ artifact=""
 digest=""
 url="${ARTIFACT_BASE_URL}"
 
-arch="$(uname -m)"
 case "${arch}" in
   "arm64")
     if [[ -z "$AARCH64_ARTIFACT" ]]; then