coder
diff --git a/‎scripts/apitypings/main.go
+6-3 b/‎scripts/apitypings/main.go
+6-3
diff --git a/‎site/src/api/typesGenerated.ts
+39-2 b/‎site/src/api/typesGenerated.ts
+39-2
@@ -32,8 +32,10 @@ func main() {
 	// Serpent has some types referenced in the codersdk.
 	// We want the referenced types generated.
 	referencePackages := map[string]string{
-		"github.com/coder/serpent": "Serpent",
-		"tailscale.com/derp":       "",
+		"github.com/coder/preview":    "",
+		"github.com/coder/serpent":    "Serpent",
+		"github.com/hashicorp/hcl/v2": "Hcl",
+		"tailscale.com/derp":          "",
 		// Conflicting name "DERPRegion"
 		"tailscale.com/tailcfg":      "Tail",
 		"tailscale.com/net/netcheck": "Netcheck",
@@ -88,7 +90,8 @@ func TypeMappings(gen *guts.GoParser) error {
 	gen.IncludeCustomDeclaration(map[string]guts.TypeOverride{
 		"github.com/coder/coder/v2/codersdk.NullTime": config.OverrideNullable(config.OverrideLiteral(bindings.KeywordString)),
 		// opt.Bool can return 'null' if unset
-		"tailscale.com/types/opt.Bool": config.OverrideNullable(config.OverrideLiteral(bindings.KeywordBoolean)),
+		"tailscale.com/types/opt.Bool":           config.OverrideNullable(config.OverrideLiteral(bindings.KeywordBoolean)),
+		"github.com/hashicorp/hcl/v2.Expression": config.OverrideLiteral(bindings.KeywordUnknown),
 	})
 
 	err := gen.IncludeCustom(map[string]string{