diff --git a/pkgs/by-name/ha/harmonist/package.nix b/pkgs/by-name/ha/harmonist/package.nix
index 4a79cb375c34..006f2ca9ded1 100644
--- a/pkgs/by-name/ha/harmonist/package.nix
+++ b/pkgs/by-name/ha/harmonist/package.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildGoModule,
   fetchFromCodeberg,
 }:
@@ -12,7 +13,13 @@ buildGoModule (finalAttrs: {
     owner = "anaseto";
     repo = "harmonist";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-9cEKkvQze+hg4CwDe5epTpuQPevylwnSP5xQAVGJ/wQ=";
+    hash =
+      # darwin's case-insensitive filesystem produces a different source hash because of map-d vs map-D
+      # is this a correctness issue?
+      if stdenv.hostPlatform.isDarwin then
+        "sha256-yNPGoCvCdrmFaUjtA1p8pgPIC9ekIizhG6oMiYRFYGA="
+      else
+        "sha256-9cEKkvQze+hg4CwDe5epTpuQPevylwnSP5xQAVGJ/wQ=";
   };
 
   vendorHash = "sha256-wibNLDdykV2psOnJbMKu0EZSrrhKRxrN/OTWXmUz2FM=";