diff --git a/NEWS.md b/NEWS.md
index 9c7724b..d8e81bc 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -12,7 +12,8 @@
   
 * Multiple API changes facilitating additional customization for tasks. 
 
-* Ensure packages destined into isolated libraries are always installed.
+* Ensure packages destined into isolated libraries or those coming from
+  non-standard sources are always installed.
 
 * Redesign logs by grouping them into package specific directories.
 
diff --git a/R/next_task.R b/R/next_task.R
index c2691f6..a392601 100644
--- a/R/next_task.R
+++ b/R/next_task.R
@@ -86,7 +86,11 @@ start_task.install_task <- function(
     libpaths,
     upgrade %nif% task$origin$version
   )
-  if (is_installed && is_lib_path_default(task)) return(NULL)
+
+  if (is_installed &&
+      is_lib_path_default(task) &&
+      inherits(task$origin, "pkg_origin_repo"))
+    return(NULL)
 
   install_process$new(
     install_parameters$package,