diff --git a/packages/games-strategy/jaggedalliance2-stracciatella/jaggedalliance2-stracciatella.exlib b/packages/games-strategy/jaggedalliance2-stracciatella/jaggedalliance2-stracciatella.exlib
index 00a7b94..541cbfa 100644
--- a/packages/games-strategy/jaggedalliance2-stracciatella/jaggedalliance2-stracciatella.exlib
+++ b/packages/games-strategy/jaggedalliance2-stracciatella/jaggedalliance2-stracciatella.exlib
@@ -38,7 +38,9 @@ ja2_config() {
 }
 
 src_prepare() {
-    sed "s:TILECACHE:[Tt][Ii][Ll][Ee][Cc][Aa][Cc][Hh][Ee]:g" -i Makefile || die "sed Makefile failed"
+    sed -e "s:TILECACHE:[Tt][Ii][Ll][Ee][Cc][Aa][Cc][Hh][Ee]:g" \
+        -e '/^INSTALL_PROGRAM ?= /s: -s::' \
+        -i Makefile || die "sed Makefile failed"
     option debug && ja2_config _DEBUG=yes WITH_SOUND_DEBUG=yes
     option demo && ja2_config WITH_DEMO=yes
     option editor && ja2_config JA2EDITOR=yes