diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 5dc98bc4481..2b1bffdacc5 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -1511,11 +1511,12 @@ let
 
   CacheFastMmap = buildPerlPackage {
     pname = "Cache-FastMmap";
-    version = "1.49";
+    version = "1.54";
     src = fetchurl {
-      url = "mirror://cpan/authors/id/R/RO/ROBM/Cache-FastMmap-1.49.tar.gz";
-      sha256 = "1azz66d4syk6b6gc95drkglajvf8igiy3449hpsm444inis9mscm";
+      url = "mirror://cpan/authors/id/R/RO/ROBM/Cache-FastMmap-1.54.tar.gz";
+      sha256 = "0lkrsr582h714jpmh5dv4szz5f7rm466xqxbavj7l9w0p40f4him";
     };
+    buildInputs = [ TestDeep ];
   };
 
   CacheKyotoTycoon = buildPerlModule {