diff --git a/etc/completion/bash/guix b/etc/completion/bash/guix
index 70430c5c95..cc18fbc94d 100644
--- a/etc/completion/bash/guix
+++ b/etc/completion/bash/guix
@@ -167,6 +167,12 @@ _guix_complete ()
 		else
 		    _guix_complete_available_package "$word_at_point"
 		fi
+            elif _guix_is_command "build"
+            then
+                if _guix_is_dash_L
+                then
+                    _guix_complete_file
+                fi
 	    elif _guix_is_command "download"
 	    then
 		 _guix_complete_file