diff --git a/build-all.sh b/build-all.sh
new file mode 100755
index 0000000..b6ae0af
--- /dev/null
+++ b/build-all.sh
@@ -0,0 +1,21 @@
+#!/bin/sh -e
+# Test whether all projects can be downloaded and built,
+# in all available configurations--Nix introspection is a bit complicated,
+# so they're listed explicitly.
+
+build() {
+	echo "$(tput bold)-- Building $*$(tput sgr0)"
+	nix-build --arg local ${LOCAL:-false} "$@"
+	echo
+}
+
+for target in *.nix
+do
+	[ "$target" = default.nix ] && continue
+
+	build "$target"
+	build "$target" --arg full false
+done
+
+build pdf-simple-sign-master.nix --arg go true
+build fiv-master.nix --arg withResvg true