diff --git a/oracle/oracle.go b/oracle/oracle.go
index 0a30ad38..4cdd2eca 100644
--- a/oracle/oracle.go
+++ b/oracle/oracle.go
@@ -278,6 +278,9 @@ func parseQueryPos(lprog *loader.Program, posFlag string, needExact bool) (*quer
 // allowErrors causes type errors to be silently ignored.
 // (Not suitable if SSA construction follows.)
 func allowErrors(lconf *loader.Config) {
+	ctxt := *lconf.Build // copy
+	ctxt.CgoEnabled = false
+	lconf.Build = &ctxt
 	lconf.AllowErrors = true
 	lconf.TypeChecker.Error = func(err error) {}
 }