diff --git a/pkgs/build-support/singularity-tools/default.nix b/pkgs/build-support/singularity-tools/default.nix
index ef8ca167b336..86e7ebe8a561 100644
--- a/pkgs/build-support/singularity-tools/default.nix
+++ b/pkgs/build-support/singularity-tools/default.nix
@@ -82,7 +82,13 @@ rec {
               util-linux
             ];
             strictDeps = true;
-            layerClosure = writeClosure contents;
+            layerClosure = writeClosure (
+              [
+                bashInteractive
+                runScriptFile
+              ]
+              ++ contents
+            );
             preVM = vmTools.createEmptyImage {
               size = diskSize;
               fullName = "${projectName}-run-disk";