diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index fac5f5e48..39798e3e1 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -32,4 +32,4 @@ jobs:
 
       - name: "Run mingw [static] build..."
         run: |
-          ./scripts/mingw.sh -c -s
+          ./scripts/mingw.sh -c -s --clean-first
diff --git a/scripts/mingw.sh b/scripts/mingw.sh
index 24fe97ad3..7f28573de 100755
--- a/scripts/mingw.sh
+++ b/scripts/mingw.sh
@@ -12,6 +12,7 @@ SRC_BASE="$SCRIPT_PATH/../build-mingw/src"
 BUILD_BASE="$SCRIPT_PATH/../build-mingw/build"
 INSTALL_BASE="$SCRIPT_PATH/../build-mingw/install"
 
+CLEAN=0
 CLONE=1
 DEPS=1
 BUILD=1
@@ -30,6 +31,9 @@ for i in "$@"; do
   -c | --no-clone)
     CLONE=0
     ;;
+  --clean-first)
+    CLEAN=1
+    ;;
   -d | --no-deps)
     DEPS=0
     ;;
@@ -48,7 +52,7 @@ for i in "$@"; do
   *)
     # unknown option
     echo "unknown option '$i', quit"
-    echo "usage:\n\t$0 [-b|--no-build] [-c|--no-clone] [-d|--no-deps] [-f|--with-ffmpeg] [-o|--with-openh264] [-s|--static]"
+    echo "usage:\n\t$0 [-b|--no-build] [-c|--no-clone] [-d|--no-deps] [-f|--with-ffmpeg] [-o|--with-openh264] [-s|--static] [--clean-first]"
     exit 1
     ;;
   esac
@@ -59,6 +63,11 @@ if [ $ARG_SHARED -ne 0 ]; then
   ARG_COMPILED_RES=0
 fi
 
+if [ $CLEAN -ne 0 ]; then
+    rm -rf "$BUILD_BASE"
+    rm -rf "$INSTALL_BASE"
+fi
+
 function do_clone {
   version=$1
   url=$2
@@ -86,7 +95,6 @@ function do_cmake_build {
     -DCMAKE_MODULE_PATH="$INSTALL_BASE/lib/cmake;$INSTALL_BASE/lib;$INSTALL_BASE" \
     -DCMAKE_INSTALL_PREFIX="$INSTALL_BASE" \
     -DBUILD_SHARED_LIBS=$ARG_SHARED \
-    -DCMAKE_INTERPROZEDURAL_OPTIMIZATION=OFF \
     -DCMAKE_EXE_LINKER_FLAGS="$CMAKE_DEFAULT_FLAGS" \
     -B "$1" \
     ${@:2}