diff --git a/docs/guide.md b/docs/guide.md
index 99ef5575..1b986f00 100644
--- a/docs/guide.md
+++ b/docs/guide.md
@@ -105,6 +105,7 @@ This is the complete list of env variables that change GHCup behavior:
 On windows, there's additionally:
 
 * `GHCUP_MSYS2`: Has to point to the root of an existing MSYS2 installation (when installed by GHCup, that's e.g. `C:\ghcup\msys64`). GHCup bootstrap takes care of this usually.
+* `GHCUP_MSYS2_ENV`: The [MSYS2 environment](https://www.msys2.org/docs/environments/) to use when executing e.g. `ghcup run --mingw-path`. Possible values are `MSYS`, `UCRT64`, `CLANG64`, `CLANGARM64`, `CLANG32`, `MINGW64`, `MINGW32`. Defauts to MINGW64, MINGW32 or CLANGARM64, depending on the architecture.
 
 ### XDG support
 
@@ -508,7 +509,7 @@ See `ghcup compile ghc --help` for further information.
 
 Since ghcup version 0.1.20.0, we provide cross bindists for GHC JS and WASM. These can be installed conveniently.
 However, these are intended as a developer preview only. By using these GHC variants, you are implicitly signing up to participate in GHC development!
-If you run into bugs or missing behavior, join the dev chat at https://matrix.to/#/#GHC:matrix.org. 
+If you run into bugs or missing behavior, join the dev chat at https://matrix.to/#/#GHC:matrix.org.
 
 First, add the cross release channel:
 
diff --git a/lib/GHCup/Prelude/Process/Windows.hs b/lib/GHCup/Prelude/Process/Windows.hs
index 22ef5290..23290f3d 100644
--- a/lib/GHCup/Prelude/Process/Windows.hs
+++ b/lib/GHCup/Prelude/Process/Windows.hs
@@ -263,12 +263,9 @@ createProcessWithMingwPath :: MonadIO m
                           => CreateProcess
                           -> m CreateProcess
 createProcessWithMingwPath cp = do
-  msys2Dir <- liftIO ghcupMsys2Dir
   cEnv <- Map.fromList <$> maybe (liftIO getEnvironment) pure (env cp)
-  let mingWPaths = [msys2Dir </> "mingw64" </> "bin"
-                   ,msys2Dir </> "usr" </> "bin"
-                   ]
-      paths = ["PATH", "Path"]
+  mingWPaths <- liftIO ghcupMsys2BinDirs'
+  let paths = ["PATH", "Path"]
       curPaths = (\x -> maybe [] splitSearchPath (Map.lookup x cEnv)) =<< paths
       newPath = intercalate [searchPathSeparator] (mingWPaths ++ curPaths)
       envWithoutPath = foldr (\x y -> Map.delete x y) cEnv paths
@@ -276,11 +273,4 @@ createProcessWithMingwPath cp = do
   liftIO $ setEnv "Path" newPath
   pure $ cp { env = Just $ Map.toList envWithNewPath }
 
-ghcupMsys2Dir :: IO FilePath
-ghcupMsys2Dir =
-  lookupEnv "GHCUP_MSYS2" >>= \case
-    Just fp -> pure fp
-    Nothing -> do
-      baseDir <- liftIO ghcupBaseDir
-      pure (fromGHCupPath baseDir </> "msys64")
 
diff --git a/lib/GHCup/Types.hs b/lib/GHCup/Types.hs
index fa8a65da..48eede24 100644
--- a/lib/GHCup/Types.hs
+++ b/lib/GHCup/Types.hs
@@ -544,11 +544,23 @@ data Dirs = Dirs
   , dbDir      :: GHCupPath
   , recycleDir :: GHCupPath -- mainly used on windows
   , tmpDir     :: GHCupPath
+  , msys2Dir   :: FilePath
   }
   deriving (Show, GHC.Generic)
 
 instance NFData Dirs
 
+data MSYS2Env = MSYS
+              | UCRT64
+              | CLANG64
+              | CLANGARM64
+              | CLANG32
+              | MINGW64
+              | MINGW32
+  deriving (Eq, Show, Ord, GHC.Generic, Read)
+
+instance NFData MSYS2Env
+
 data KeepDirs = Always
               | Errors
               | Never
diff --git a/lib/GHCup/Utils.hs b/lib/GHCup/Utils.hs
index 551e6795..2ca562b6 100644
--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@@ -1155,7 +1155,7 @@ ensureShimGen
 
 -- | Ensure ghcup directory structure exists.
 ensureDirectories :: Dirs -> IO ()
-ensureDirectories (Dirs baseDir binDir cacheDir logsDir confDir trashDir dbDir tmpDir) = do
+ensureDirectories (Dirs baseDir binDir cacheDir logsDir confDir trashDir dbDir tmpDir _) = do
   createDirRecursive' (fromGHCupPath baseDir)
   createDirRecursive' (fromGHCupPath baseDir </> "ghc")
   createDirRecursive' (fromGHCupPath baseDir </> "hls")
diff --git a/lib/GHCup/Utils/Dirs.hs b/lib/GHCup/Utils/Dirs.hs
index 838341ea..68b8310e 100644
--- a/lib/GHCup/Utils/Dirs.hs
+++ b/lib/GHCup/Utils/Dirs.hs
@@ -32,6 +32,8 @@ module GHCup.Utils.Dirs
   , getConfigFilePath'
   , useXDG
   , cleanupTrash
+  , ghcupMsys2BinDirs
+  , ghcupMsys2BinDirs'
 
   , GHCupPath
   , appendGHCupPath
@@ -136,6 +138,7 @@ import           GHC.IO.Exception               ( IOErrorType(NoSuchThing) )
 import           Haskus.Utils.Variant.Excepts
 import           Optics hiding ( uncons )
 import           Safe
+import           System.Info
 import           System.Directory hiding ( removeDirectory
                                          , removeDirectoryRecursive
                                          , removePathForcibly
@@ -338,6 +341,48 @@ ghcupTMPDir
         else ghcupBaseDir <&> (\(GHCupPath gp) -> GHCupPath (gp </> "tmp"))
 
 
+ghcupMsys2Dir :: IO FilePath
+ghcupMsys2Dir =
+  lookupEnv "GHCUP_MSYS2" >>= \case
+    Just fp -> pure fp
+    Nothing -> do
+      baseDir <- liftIO ghcupBaseDir
+      pure (fromGHCupPath baseDir </> "msys64")
+
+ghcupMsys2BinDirs :: (MonadFail m, MonadIO m, MonadReader env m, HasDirs env) => m [FilePath]
+ghcupMsys2BinDirs = do
+  Dirs{..} <- getDirs
+  liftIO $ ghcupMsys2BinDirs_ msys2Dir
+
+ghcupMsys2BinDirs' :: IO [FilePath]
+ghcupMsys2BinDirs' = do
+  msys2Dir <- ghcupMsys2Dir
+  ghcupMsys2BinDirs_ msys2Dir
+
+ghcupMsys2BinDirs_ :: FilePath -> IO [FilePath]
+ghcupMsys2BinDirs_ msys2Dir' = do
+  env <- liftIO (lookupEnv "GHCUP_MSYS2_ENV") >>= \case
+    Just env -> maybe (fail parseFailMsg) pure $ readMay @MSYS2Env env
+    Nothing
+      | "x86_64"  <- arch -> pure MINGW64
+      | "i386"    <- arch -> pure MINGW32
+      | "aarch64" <- arch -> pure CLANGARM64
+      | otherwise -> fail "No compatible architecture for msys2"
+  pure [msys2Dir' </> toEnvDir env, msys2Dir' </> toEnvDir MSYS]
+ where
+  -- https://www.msys2.org/docs/environments/
+  toEnvDir :: MSYS2Env -> FilePath
+  toEnvDir MSYS       = "usr"
+  toEnvDir UCRT64     = "ucrt64"
+  toEnvDir CLANG64    = "clang64"
+  toEnvDir CLANGARM64 = "clangarm64"
+  toEnvDir CLANG32    = "clang32"
+  toEnvDir MINGW64    = "mingw64"
+  toEnvDir MINGW32    = "mingw32"
+
+  parseFailMsg = "Invalid value for GHCUP_MSYS2_ENV. Valid values are: MSYS, UCRT64, CLANG64, CLANGARM64, CLANG32, MINGW64, MINGW32"
+
+
 getAllDirs :: IO Dirs
 getAllDirs = do
   baseDir    <- ghcupBaseDir
@@ -348,6 +393,7 @@ getAllDirs = do
   recycleDir <- ghcupRecycleDir
   tmpDir     <- ghcupTMPDir
   dbDir      <- ghcupDbDir
+  msys2Dir   <- ghcupMsys2Dir
   pure Dirs { .. }
 
 
diff --git a/scripts/bootstrap/bootstrap-haskell b/scripts/bootstrap/bootstrap-haskell
index e145c1c3..16decc30 100755
--- a/scripts/bootstrap/bootstrap-haskell
+++ b/scripts/bootstrap/bootstrap-haskell
@@ -20,6 +20,7 @@
 #   * BOOTSTRAP_HASKELL_ADJUST_CABAL_CONFIG - whether to adjust mingw paths in cabal.config on windows
 #   * BOOTSTRAP_HASKELL_DOWNLOADER - which downloader to use (default: curl)
 #   * GHCUP_BASE_URL - the base url for ghcup binary download (use this to overwrite https://downloads.haskell.org/~ghcup with a mirror)
+#   * GHCUP_MSYS2_ENV - the msys2 environment to use on windows, see https://www.msys2.org/docs/environments/ (defauts to MINGW64, MINGW32 or CLANGARM64, depending on the architecture)
 
 # License: LGPL-3.0
 
@@ -27,6 +28,15 @@
 # safety subshell to avoid executing anything in case this script is not downloaded properly
 (
 
+die() {
+    if [ -n "${NO_COLOR}" ] ; then
+        (>&2 printf "%s\\n" "$1")
+    else
+        (>&2 printf "\\033[0;31m%s\\033[0m\\n" "$1")
+    fi
+    exit 2
+}
+
 plat="$(uname -s)"
 arch=$(uname -m)
 ghver="0.1.20.0"
@@ -55,18 +65,40 @@ case "${plat}" in
 			;;
 esac
 
+case "${GHCUP_MSYS2_ENV}" in
+    "")
+        case "${arch}" in
+            x86_64|amd64)
+                GHCUP_MSYS2_ENV_DIR="mingw64" ;;
+            i*86)
+                GHCUP_MSYS2_ENV_DIR="mingw32" ;;
+            aarch64|arm64)
+                GHCUP_MSYS2_ENV_DIR="clangarm64" ;;
+            *) die "Unknown architecture: ${arch}" ;;
+        esac
+        ;;
+    MSYS)
+        GHCUP_MSYS2_ENV_DIR="usr" ;;
+    UCRT64)
+        GHCUP_MSYS2_ENV_DIR="ucrt64" ;;
+    CLANG64)
+        GHCUP_MSYS2_ENV_DIR="clang64" ;;
+    CLANGARM64)
+        GHCUP_MSYS2_ENV_DIR="clangarm64" ;;
+    CLANG32)
+        GHCUP_MSYS2_ENV_DIR="clang32" ;;
+    MINGW64)
+        GHCUP_MSYS2_ENV_DIR="mingw64" ;;
+    MINGW32)
+        GHCUP_MSYS2_ENV_DIR="mingw32" ;;
+    *)
+        die "Invalid value for GHCUP_MSYS2_ENV. Valid values are: MSYS, UCRT64, CLANG64, CLANGARM64, CLANG32, MINGW64, MINGW32" ;;
+esac
+
 : "${BOOTSTRAP_HASKELL_GHC_VERSION:=recommended}"
 : "${BOOTSTRAP_HASKELL_CABAL_VERSION:=recommended}"
 
 
-die() {
-    if [ -n "${NO_COLOR}" ] ; then
-        (>&2 printf "%s\\n" "$1")
-    else
-        (>&2 printf "\\033[0;31m%s\\033[0m\\n" "$1")
-    fi
-    exit 2
-}
 
 warn() {
     if [ -n "${NO_COLOR}" ] ; then
@@ -591,7 +623,7 @@ adjust_cabal_config() {
     else
         cabal_bin="$HOME/AppData/Roaming/cabal/bin"
     fi
-    ecabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
+    ecabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/${GHCUP_MSYS2_ENV_DIR}/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/${GHCUP_MSYS2_ENV_DIR}/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/${GHCUP_MSYS2_ENV_DIR}/lib)" -f init
 }
 
 ask_cabal_config_init() {
diff --git a/scripts/bootstrap/bootstrap-haskell.ps1 b/scripts/bootstrap/bootstrap-haskell.ps1
index 7e2cc2c4..0da990cf 100644
--- a/scripts/bootstrap/bootstrap-haskell.ps1
+++ b/scripts/bootstrap/bootstrap-haskell.ps1
@@ -46,7 +46,9 @@ param (
     # Whether to disable creation of several desktop shortcuts
     [switch]$DontWriteDesktopShortcuts,
     # Whether to disable adjusting bashrc (in msys2 env) with PATH
-    [switch]$DontAdjustBashRc
+    [switch]$DontAdjustBashRc,
+	# The msys2 environment to use, see https://www.msys2.org/docs/environments/ (defauts to MINGW64, MINGW32 or CLANGARM64, depending on the architecture)
+	[string]$Msys2Env
 )
 
 $DefaultMsys2Version = "20221216"
@@ -653,10 +655,15 @@ if (!($DontAdjustBashRc)) {
   $AdjustBashRcExport = 'export BOOTSTRAP_HASKELL_ADJUST_BASHRC=1 ;'
 }
 
+if (!($Msys2Env)) {
+  $Msys2EnvExport = ('export GHCUP_MSYS2_ENV={0} ;' -f $Msys2Env)
+  $null = [Environment]::SetEnvironmentVariable("GHCUP_MSYS2_ENV", $Msys2Env, [System.EnvironmentVariableTarget]::User)
+}
+
 if ((Get-Process -ID $PID).ProcessName.StartsWith("bootstrap-haskell") -Or $InBash) {
-  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} {10} {12} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript, $AdjustBashRcExport)
+  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} {10} {12} {13} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript, $AdjustBashRcExport, $Msys2EnvExport)
 } else {
-  Exec "$Msys2Shell" '-mingw64' '-mintty'  '-shell' 'bash' '-c' ('{4} {6} {7} {8} {9} {10} {12} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript, $AdjustBashRcExport)
+  Exec "$Msys2Shell" '-mingw64' '-mintty'  '-shell' 'bash' '-c' ('{4} {6} {7} {8} {9} {10} {12} {13} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript, $AdjustBashRcExport, $Msys2EnvExport)
 }