diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,8 @@
 # Revision history for glirc2
 
+## 2.20.1.1
+* Remove macro dependency on happy and alex being installed for version information
+
 ## 2.20.1
 * Support `vty-5.11.1`
 
diff --git a/glirc.cabal b/glirc.cabal
--- a/glirc.cabal
+++ b/glirc.cabal
@@ -1,5 +1,5 @@
 name:                glirc
-version:             2.20.1
+version:             2.20.1.1
 synopsis:            Console IRC client
 description:         Console IRC client
                      .
diff --git a/src/Client/Options.hs b/src/Client/Options.hs
--- a/src/Client/Options.hs
+++ b/src/Client/Options.hs
@@ -1,4 +1,13 @@
 {-# Language CPP, TemplateHaskell, MultiWayIf #-}
+
+#ifndef TOOL_VERSION_alex
+#define TOOL_VERSION_alex "none"
+#endif
+
+#ifndef TOOL_VERSION_happy
+#define TOOL_VERSION_happy "none"
+#endif
+
 {-|
 Module      : Client.Options
 Description : Processing of command-line options