diff --git a/desktop/picom/picom.SlackBuild b/desktop/picom/picom.SlackBuild
index ab2cb4de22..ad9e9a969d 100644
--- a/desktop/picom/picom.SlackBuild
+++ b/desktop/picom/picom.SlackBuild
@@ -73,7 +73,8 @@ find -L . \
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 meson build . -D build_docs=true -D b_ndebug=true --prefix=/usr
-DESTDIR=$PKG ninja -C build install
+"${NINJA:=ninja}"
+DESTDIR=$PKG $NINJA -C build install
 
 find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
   | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true