diff --git a/1-setup-windows-msys2.sh b/1-setup-windows-msys2.sh
old mode 100644
new mode 100755
index 79f48ea..79f48ea
--- a/1-setup-windows-msys2.sh
+++ b/1-setup-windows-msys2.sh
diff --git a/autobuild/build.sh b/autobuild/build.sh
index 4f7e382..a19567e 100755
--- a/autobuild/build.sh
+++ b/autobuild/build.sh
@@ -63,11 +63,10 @@ else
 	DEBUG=''
 fi
 
-[ -d ETL ] || mkdir ETL
-[ -d synfig-core ] || mkdir synfig-core
-[ -d synfig-studio ] || mkdir synfig-studio
-[ -d "${PREFIX}" ] || mkdir "${PREFIX}"
-[ -d "${PREFIX}/bin" ] || mkdir "${PREFIX}/bin"
+mkdir -p ETL
+mkdir -p synfig-core
+mkdir -p synfig-studio
+mkdir -p "${PREFIX}/bin"
 
 #========================== VARIABLES ==================================
 
diff --git a/autobuild/msys2/build_mlt.sh b/autobuild/msys2/build_mlt.sh
index a05fe72..ed2a053 100644
--- a/autobuild/msys2/build_mlt.sh
+++ b/autobuild/msys2/build_mlt.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 # -------------------------------------------------------------------------------
-# This script builds mlt++ required by synfig-core
+# This script builds mlt++ on MSYS2 required by synfig-core
 # -------------------------------------------------------------------------------
 set -e # exit on error
 
@@ -11,24 +11,26 @@ source ${SCRIPT_DIR}/set_env.sh
 
 VERSION_MLT="6.16.0"
 PATH="${PREFIX}/lib/ccache/bin:${PATH}"
+MLT_PATH="/opt/mlt-${VERSION_MLT}"
 
-if [ ! -f /opt/mlt-${VERSION_MLT}/done ]; then
+if [ ! -f ${MLT_PATH}/done ]; then
 
 echo " ======================= Compiling MLT++ ======================= "
 
-mkdir -p /opt/mlt-${VERSION_MLT}/
+mkdir -p ${MLT_PATH}
 
-cd /tmp
+pushd /tmp
 wget "https://github.com/mltframework/mlt/releases/download/v${VERSION_MLT}/mlt-${VERSION_MLT}.tar.gz"
 tar xzf ./mlt-${VERSION_MLT}.tar.gz
 
 pushd mlt-${VERSION_MLT}/
-echo "Install path: ${PREFIX}"
-./configure --prefix=/opt/mlt-${VERSION_MLT} --target-arch=$MSYS2_ARCH --disable-gtk2
+echo "Install path: ${MLT_PATH}"
+./configure --prefix=${MLT_PATH} --target-arch=$MSYS2_ARCH --disable-gtk2
 make -j2 --silent
 make install
 popd
 
-touch /opt/mlt-${VERSION_MLT}/done
+touch ${MLT_PATH}/done
 
+popd
 fi