diff --git a/.github/scripts/Linux/arm/build.sh b/.github/scripts/Linux/arm/build.sh
index ff853992e..34ce2ab3c 100755
--- a/.github/scripts/Linux/arm/build.sh
+++ b/.github/scripts/Linux/arm/build.sh
@@ -12,7 +12,7 @@ APPNAME=UltraGrid-latest-${ARCH}.AppImage
 
 ./autogen.sh --enable-plugins
 make -j "$(nproc)"
-UG_SKIP_NET_TESTS=1
+export UG_SKIP_NET_TESTS=1
 make check
 make distcheck