Don't try to install global packages as a local user

src/freedombone-app-scuttlebot

 if ! npm install --arch=$NPM_ARCH scuttlebot@${SCUTTLEBOT_VERSION}; then
     exit 2
 fi
-if ! npm install --arch=$NPM_ARCH -g git-ssb; then
-    exit 3
-fi
-if ! npm install --arch=$NPM_ARCH -g git-remote-ssb; then
-    exit 4
-fi
 exit 0
 EOF
     chroot "$rootdir" /bin/chmod +x /usr/bin/install_scuttlebot
         exit 528253
     fi
 
+    cat <<EOF > "$rootdir/usr/bin/install_git_ssb"
+#!/bin/bash
+if ! npm install --arch=$NPM_ARCH -g git-ssb; then
+    exit 1
+fi
+if ! npm install --arch=$NPM_ARCH -g git-remote-ssb; then
+    exit 2
+fi
+exit 0
+EOF
+    chroot "$rootdir" /bin/chmod +x /usr/bin/install_git_ssb
+    chroot "$rootdir" /usr/bin/install_git_ssb
+    rm "$rootdir/usr/bin/install_git_ssb"
+
     # daemon
     { echo '[Unit]';
       echo 'Description=Scuttlebot (messaging system)';