it workie

.gitignore

@@ -0,0 +1,3 @@
+pkg/
+src/
+*.pkg.tar.*

PKGBUILD

@@ -10,11 +10,11 @@ provides=($pkgname)
 conflicts=($pkgname)
 depends=('bash')
 source=('warner')
+install="warner.install"
 md5sums=('02ce7e9e8c29c3d110ca2280ac1cdfcf')
 
 package() {
   chmod +x warner
   mkdir -p ${pkgdir}/usr/bin
   cp warner ${pkgdir}/usr/bin/pkg-warner
-  ln -s /usr/bin/pkg-warner ${pkgdir}/usr/bin/{apt,apt-get,zypper,dnf,eopkg,apk}
 }

warner.install

@@ -0,0 +1,10 @@
+post_install() {
+    for x in apt apt-get zypper dnf eopkg apk; do
+        ln -s /usr/bin/pkg-warner /usr/bin/$x
+        echo "linked to $x"
+    done
+}
+
+post_upgrade() {
+    post_install
+}