diff --git a/rattail_fabric2/corepos.py b/rattail_fabric2/corepos.py
index 778ce3d..146a1a9 100644
--- a/rattail_fabric2/corepos.py
+++ b/rattail_fabric2/corepos.py
@@ -63,11 +63,11 @@ def install_corepos(c, rootdir, rooturl_office, production=True,
 
     # composer install
     # TODO: these 'allow' entries are needed for composer 2.4 at least...
-    c.sudo("bash -c 'cd {} && {} config --no-plugins allow-plugins.composer/installers true'".format(is4c, composer),
+    c.sudo("bash -c 'cd {} && {} config --global --no-plugins allow-plugins.composer/installers true'".format(is4c, composer),
            user=user)
-    c.sudo("bash -c 'cd {} && {} config --no-plugins allow-plugins.oomphinc/composer-installers-extender true'".format(is4c, composer),
+    c.sudo("bash -c 'cd {} && {} config --global --no-plugins allow-plugins.oomphinc/composer-installers-extender true'".format(is4c, composer),
            user=user)
-    c.sudo("bash -c 'cd {} && {} config --no-plugins allow-plugins.corepos/composer-installer true'".format(is4c, composer),
+    c.sudo("bash -c 'cd {} && {} config --global --no-plugins allow-plugins.corepos/composer-installer true'".format(is4c, composer),
            user=user)
     c.sudo("bash -c 'cd {} && {} install'".format(is4c, composer),
            user=user)