diff --git a/lib/default.nix b/lib/default.nix
index a909cefd60f1..d00c4abec0a9 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -141,7 +141,7 @@ let
       mergeAttrsWithFunc mergeAttrsConcatenateValues
       mergeAttrsNoOverride mergeAttrByFunc mergeAttrsByFuncDefaults
       mergeAttrsByFuncDefaultsClean mergeAttrBy
-      fakeSha256 fakeSha512
+      fakeSri fakeSha256 fakeSha512
       nixType imap;
     inherit (versions)
       splitVersion;
diff --git a/lib/deprecated.nix b/lib/deprecated.nix
index 155d6f0c3611..8c4fe9c390c6 100644
--- a/lib/deprecated.nix
+++ b/lib/deprecated.nix
@@ -272,6 +272,7 @@ rec {
   imap = imap1;
 
   # Fake hashes. Can be used as hash placeholders, when computing hash ahead isn't trivial
+  fakeSri = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
   fakeSha256 = "0000000000000000000000000000000000000000000000000000000000000000";
   fakeSha512 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000";
 }