diff --git a/bin/dart b/bin/dart
index 42743f7ae563..0c1f402819be 100755
--- a/bin/dart
+++ b/bin/dart
@@ -48,7 +48,7 @@ BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 OS="$(uname -s)"
 
 # If we're on Windows, invoke the batch script instead to get proper locking.
-if [[ $OS =~ MINGW.* || $OS =~ CYGWIN.* ]]; then
+if [[ $OS =~ MINGW.* || $OS =~ CYGWIN.* || $OS =~ MSYS.* ]]; then
   exec "${BIN_DIR}/dart.bat" "$@"
 fi
 
diff --git a/bin/flutter b/bin/flutter
index 591b0107cb32..9347b8dad694 100755
--- a/bin/flutter
+++ b/bin/flutter
@@ -53,7 +53,7 @@ BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 OS="$(uname -s)"
 
 # If we're on Windows, invoke the batch script instead to get proper locking.
-if [[ $OS =~ MINGW.* || $OS =~ CYGWIN.* ]]; then
+if [[ $OS =~ MINGW.* || $OS =~ CYGWIN.* || $OS =~ MSYS.* ]]; then
   exec "${BIN_DIR}/flutter.bat" "$@"
 fi
 
diff --git a/bin/internal/shared.sh b/bin/internal/shared.sh
index 76717114f546..4a4d6534e71d 100644
--- a/bin/internal/shared.sh
+++ b/bin/internal/shared.sh
@@ -200,7 +200,7 @@ function shared::execute() {
   # If running over git-bash, overrides the default UNIX executables with win32
   # executables
   case "$(uname -s)" in
-    MINGW*)
+    MINGW* | MSYS* )
       DART="$DART.exe"
       ;;
   esac
diff --git a/bin/internal/update_dart_sdk.sh b/bin/internal/update_dart_sdk.sh
index 49e4698a824e..82bd39c1f913 100755
--- a/bin/internal/update_dart_sdk.sh
+++ b/bin/internal/update_dart_sdk.sh
@@ -102,7 +102,7 @@ if [ ! -f "$ENGINE_STAMP" ] || [ "$ENGINE_VERSION" != `cat "$ENGINE_STAMP"` ]; t
       DART_ZIP_NAME="dart-sdk-linux-${ARCH}.zip"
       IS_USER_EXECUTABLE="-perm /u+x"
       ;;
-    MINGW*)
+    MINGW* | MSYS* )
       DART_ZIP_NAME="dart-sdk-windows-x64.zip"
       IS_USER_EXECUTABLE="-perm /u+x"
       ;;