diff --git a/.github/scripts/Windows/install_natpmp.sh b/.github/scripts/Windows/install_natpmp.sh
index 0121d6912..94fe80ce3 100755
--- a/.github/scripts/Windows/install_natpmp.sh
+++ b/.github/scripts/Windows/install_natpmp.sh
@@ -1,8 +1,13 @@
-#!/bin/sh -eu
+#!/bin/sh -eux
 
 git clone --depth 1 https://github.com/miniupnp/libnatpmp
 cd libnatpmp
-cmd /c build.bat
+
+gcc -c -Wall -Os -DWIN32 -DNATPMP_STATICLIB -DENABLE_STRNATPMPERR getgateway.c
+gcc -c -Wall -Os -DWIN32 -DNATPMP_STATICLIB -DENABLE_STRNATPMPERR natpmp.c
+gcc -c -Wall -Os -DWIN32 wingettimeofday.c
+ar cr natpmp.a getgateway.o natpmp.o wingettimeofday.o
+
 cp natpmp.a /usr/local/lib/libnatpmp.a
 cp natpmp_declspec.h natpmp.h /usr/local/include
 cd -