diff --git a/script/build b/script/build
index d5cb5c8..46d4dd5 100755
--- a/script/build
+++ b/script/build
@@ -6,10 +6,21 @@
 # Builds the Swift Package.
 #
 
+# Build for the host architecture by default.
+ARCH=
+if [[ "$1" == '--universal' ]]; then
+  ARCH='--arch arm64 --arch x86_64'
+fi
+
+# Disable the manifest cache on Xcode 12.5 and later.
+CACHE=
+if [[ "$(swift build --help)" =~ manifest-cache ]]; then
+  CACHE='--manifest-cache none'
+fi
+
 echo "==> 🏗️ Building mas ($(script/version))"
 swift build \
   --configuration release \
-  --arch arm64 \
-  --arch x86_64 \
+  ${ARCH} \
   --disable-sandbox \
-  --manifest-cache none
+  ${CACHE}
diff --git a/script/build_artifacts b/script/build_artifacts
index a3b3a10..30d384b 100755
--- a/script/build_artifacts
+++ b/script/build_artifacts
@@ -11,6 +11,5 @@ VERSION=$(script/version)
 echo "Building mas $VERSION artifacts"
 
 script/clean
-script/build
-script/archive
+script/build --universal
 script/package
diff --git a/script/install b/script/install
index 20c4466..7bb2379 100755
--- a/script/install
+++ b/script/install
@@ -10,18 +10,29 @@
 # https://github.com/Homebrew/homebrew-core/blob/master/Formula/mas.rb
 #
 
+ARCH=$(uname -m)
+RELEASE=.build/${ARCH}-apple-macosx/release
 VERSION=$(script/version)
 
-# Override default prefix path with optional 1st arg
-if test -n "$1"; then
-  PREFIX="$1"
-elif [[ $(uname -m) == 'arm64' ]]; then
+if [[ $(uname -m) == 'arm64' ]]; then
   PREFIX=/opt/homebrew
 else
   PREFIX=/usr/local
 fi
 
+while test -n "$1"; do
+  if [[ "$1" == '--universal' ]]; then
+    ARCH=universal
+    RELEASE=.build/apple/Products/Release
+  else
+    # Override default prefix path with optional arg
+    PREFIX="$1"
+  fi
+
+  shift
+done
+
 echo "==> 📲 Installing mas ($VERSION) for $ARCH to $PREFIX"
 ditto -v \
-  ".build/apple/Products/Release/mas" \
+  "$RELEASE/mas" \
   "$PREFIX/bin/"
diff --git a/script/package b/script/package
index 526c2c4..686647c 100755
--- a/script/package
+++ b/script/package
@@ -18,7 +18,7 @@ DISTRIBUTION_PLIST="Package/Distribution.plist"
 
 # Destination for install root
 DSTROOT=.build/distributions
-script/install "$DSTROOT/usr/local"
+script/install "$DSTROOT/usr/local" --universal
 
 VERSION=$(script/version)
 
diff --git a/script/uninstall b/script/uninstall
index 853e35b..8e2af57 100755
--- a/script/uninstall
+++ b/script/uninstall
@@ -3,7 +3,7 @@
 # script/uninstall
 # mas
 #
-# Removes mas and MasKit from PREFIX.
+# Removes mas from PREFIX.
 #
 
 # Override default prefix path with optional 1st arg