diff --git a/ghc-lib-gen.cabal b/ghc-lib-gen.cabal
index fc0f074a..590b7ac5 100644
--- a/ghc-lib-gen.cabal
+++ b/ghc-lib-gen.cabal
@@ -52,7 +52,7 @@ executable ghc-lib-gen
 
 executable ghc-lib-build-tool
   import: base
-  build-tool-depends: alex:alex, happy:happy < 2.0
+  build-tool-depends: alex:alex, happy:happy
   build-depends:
     directory, filepath, time, extra, optparse-applicative
   if flag(semaphore-compat)
diff --git a/ghc-lib-gen/src/Ghclibgen.hs b/ghc-lib-gen/src/Ghclibgen.hs
index a4bd4c7a..73ab846f 100644
--- a/ghc-lib-gen/src/Ghclibgen.hs
+++ b/ghc-lib-gen/src/Ghclibgen.hs
@@ -1357,7 +1357,7 @@ generateGhcLibCabal ghcFlavor customCppOpts = do
         "    build-depends:"
       ],
       indent2 (Data.List.NonEmpty.toList (withCommas (ghcLibBuildDepends ghcFlavor))),
-      ["    build-tool-depends: alex:alex >= 3.1, " ++ "happy:happy > " ++ if ghcSeries ghcFlavor < GHC_8_10 then "1.19" else "1.20" ++ " && < 2.0"],
+      ["    build-tool-depends: alex:alex >= 3.1, " ++ "happy:happy > " ++ if ghcSeries ghcFlavor < GHC_8_10 then "1.19" else "1.20"],
       ["    other-extensions:"],
       indent2 (askField lib "other-extensions:"),
       ["    default-extensions:"],
@@ -1467,7 +1467,7 @@ generateGhcLibParserCabal ghcFlavor customCppOpts = do
       [ "    if impl(ghc >= 9.10)",
         "      build-depends: ghc-internal"
       ],
-      ["    build-tool-depends: alex:alex >= 3.1, " ++ "happy:happy > " ++ if ghcSeries ghcFlavor < GHC_8_10 then "1.19" else "1.20" ++ " && < 2.0"],
+      ["    build-tool-depends: alex:alex >= 3.1, " ++ "happy:happy > " ++ if ghcSeries ghcFlavor < GHC_8_10 then "1.19" else "1.20"],
       ["    other-extensions:"],
       indent2 (askField lib "other-extensions:"),
       ["    default-extensions:"],