diff --git a/src/Tasks/Exec.cs b/src/Tasks/Exec.cs
index 21bf75ad407..dbf4be1fc51 100644
--- a/src/Tasks/Exec.cs
+++ b/src/Tasks/Exec.cs
@@ -591,7 +591,7 @@ protected internal override void AddCommandLineCommands(CommandLineBuilderExtens
             {
                 commandLine.AppendSwitch("-c");
                 commandLine.AppendTextUnquoted(" \"");
-                commandLine.AppendTextUnquoted(". ");
+                commandLine.AppendTextUnquoted("export LANG=en_US.UTF-8; export LC_ALL=en_US.UTF-8; . ");
                 commandLine.AppendFileNameIfNotNull(batchFileForCommandLine);
                 commandLine.AppendTextUnquoted("\"");
             }