diff --git a/flake.nix b/flake.nix
index 8edb043..5c1ebdf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -126,7 +126,7 @@
           lockFile = src/Cargo.lock;
           outputHashes = {
               "tar-no-std-0.1.8" = "sha256-xm17108v4smXOqxdLvHl9CxTCJslmeogjm4Y87IXFuM=";
-              "nalgebra-0.32.6" = "sha256-L/YudkVOtfGYoNQKBD7LMk/sMYgRDzPDdpGL5rO7G2I=";
+              "fatfs-0.4.0" = "sha256-P7IgvhwTPXtNhcyv8cFqwO2UdaEcCGJY7UBG6+yBFSg=";
             };
         };