diff --git a/pkgs/by-name/sa/saunafs/package.nix b/pkgs/by-name/sa/saunafs/package.nix
index c6aeaea8f875..6137211a8f8a 100644
--- a/pkgs/by-name/sa/saunafs/package.nix
+++ b/pkgs/by-name/sa/saunafs/package.nix
@@ -22,13 +22,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "saunafs";
-  version = "4.11.0";
+  version = "5.1.2";
 
   src = fetchFromGitHub {
     owner = "leil-io";
     repo = "saunafs";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-ZQ0+jiVpHZhAOdYneKkPi3M45LU9xj2FBbqo6VcD0JY=";
+    hash = "sha256-56PlUeXHqNhKYokKWqLCeaP3FZBdefhQFQQoP8YytQQ=";
   };
 
   patches = [
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f2148de80af5..cefc8f15ceb4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4110,6 +4110,13 @@ with pkgs;
 
   sasview = libsForQt5.callPackage ../applications/science/misc/sasview { };
 
+  saunafs = callPackage ../by-name/sa/saunafs/package.nix {
+    fmt = fmt_11;
+    spdlog = spdlog.override {
+      fmt = fmt_11;
+    };
+  };
+
   scfbuild = python3.pkgs.callPackage ../tools/misc/scfbuild { };
 
   segger-jlink-headless = callPackage ../by-name/se/segger-jlink/package.nix { headless = true; };