diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index b8c5d976..a86ded0d 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -35,11 +35,6 @@ jobs:
             compilerVersion: 9.10.1
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.8.3
-            compilerKind: ghc
-            compilerVersion: 9.8.3
-            setup-method: ghcup
-            allow-failure: false
           - compiler: ghc-9.8.3
             compilerKind: ghc
             compilerVersion: 9.8.3
@@ -186,7 +181,7 @@ jobs:
       - name: cache (tools)
         uses: actions/cache/restore@v4
         with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-4fd5cdc7
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-c0a7f8fa
           path: ~/.haskell-ci-tools
       - name: install cabal-plan
         run: |
@@ -214,7 +209,7 @@ jobs:
         if: always()
         uses: actions/cache/save@v4
         with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-4fd5cdc7
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-c0a7f8fa
           path: ~/.haskell-ci-tools
       - name: checkout
         uses: actions/checkout@v4
diff --git a/src/HaskellCI/Config.hs b/src/HaskellCI/Config.hs
index 9b41e4de..1a811fd2 100644
--- a/src/HaskellCI/Config.hs
+++ b/src/HaskellCI/Config.hs
@@ -62,8 +62,7 @@ parseConfigFile fields0 = do
 
 postprocessConfig :: Config -> Config
 postprocessConfig cfg
-    -- on yammy the only install option is ghcup
-    | cfgUbuntu cfg >= Jammy = cfg { cfgGhcupJobs = anyVersion }
+    | cfgUbuntu cfg >= Jammy = cfg
     | otherwise              = cfg
 
 -------------------------------------------------------------------------------
diff --git a/src/HaskellCI/Config/History.hs b/src/HaskellCI/Config/History.hs
index f3effb48..b3c41225 100644
--- a/src/HaskellCI/Config/History.hs
+++ b/src/HaskellCI/Config/History.hs
@@ -16,9 +16,7 @@ import HaskellCI.Config.Ubuntu
 import HaskellCI.Compiler (invertVersionRange)
 
 ghcupNormalRange :: VersionRange
-ghcupNormalRange = C.unionVersionRanges
-    (C.intersectVersionRanges (C.laterVersion (mkVersion [8,10,4])) (C.earlierVersion (mkVersion [9])))
-    (C.laterVersion (mkVersion [9,0,1]))
+ghcupNormalRange = C.laterVersion (mkVersion [8,4,4])
 
 configHistory :: [([Int], Config -> Config)]
 configHistory =
@@ -36,7 +34,8 @@ configHistory =
     , ver 0 19 20240708 := \cfg -> cfg
         & field @"cfgGhcupVersion" .~ C.mkVersion [0,1,30,0]
     , ver 0 19 20241111 := \cfg -> cfg
-        & field @"cfgGhcupJobs"           .~ C.intersectVersionRanges (C.intersectVersionRanges ghcupNormalRange (C.earlierVersion (C.mkVersion [9,12,0]))) (invertVersionRange (C.withinVersion (C.mkVersion [9,8,3])))
+        & field @"cfgHvrPpaJobs"          .~ C.earlierVersion (C.mkVersion [8,4])
+        & field @"cfgGhcupJobs"           .~ C.simplifyVersionRange (C.intersectVersionRanges (C.intersectVersionRanges ghcupNormalRange (C.earlierVersion (C.mkVersion [9,12,0]))) (invertVersionRange (C.withinVersion (C.mkVersion [9,8,3]))))
         & field @"cfgGhcupVanillaJobs"    .~ C.withinVersion (C.mkVersion [9,8,3])
         & field @"cfgGhcupPrereleaseJobs" .~ C.orLaterVersion (C.mkVersion [9,12,0])
     ]
diff --git a/src/HaskellCI/GitHub.hs b/src/HaskellCI/GitHub.hs
index 3bef7815..304746c1 100644
--- a/src/HaskellCI/GitHub.hs
+++ b/src/HaskellCI/GitHub.hs
@@ -529,6 +529,8 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                     [ Map.singleton "postgres" postgresService | cfgPostgres ]
                 , ghjTimeout         = max 10 cfgTimeoutMinutes
                 , ghjMatrix          = concat $
+                    -- we can have multiple setup methods for the same
+                    -- compiler version, if jobs overlap.
                     [ [ GitHubMatrixEntry
                         { ghmeCompiler     = translateCompilerVersion $ compiler
                         , ghmeAllowFailure =
@@ -542,11 +544,11 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                             GHCUPvanilla    -> cfgGhcupVanillaJobs
                             GHCUPprerelease -> cfgGhcupPrereleaseJobs
                             HVRPPA          -> cfgHvrPpaJobs
-                        ]
-                    | compiler <- reverse $ toList linuxVersions
-                    , compiler /= GHCHead -- TODO: Make this work
+                      ]
+                      | compiler <- reverse $ toList linuxVersions
+                      , compiler /= GHCHead -- TODO: Make this work
                                           -- https://github.com/haskell-CI/haskell-ci/issues/458
-                    ]
+                      ]
                 })
 
             unless (null cfgIrcChannels) $