diff --git a/flake.nix b/flake.nix
index b5929a5ee..0bf0dd30e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -85,8 +85,6 @@
               set -eou pipefail
 
               ${pkgs.mix2nix}/bin/mix2nix ./mix.lock > mix.nix
-              rm -rf ./node_modules/ ./package-lock.json
-              ${pkgs.nodejs-18_x}/bin/npm install
             '';
         });
 
diff --git a/mix.nix b/mix.nix
index 07a6524de..a21b75926 100644
--- a/mix.nix
+++ b/mix.nix
@@ -1609,12 +1609,12 @@ let
 
     sentry = buildMix rec {
       name = "sentry";
-      version = "9.1.0";
+      version = "8.1.0";
 
       src = fetchHex {
         pkg = "sentry";
         version = "${version}";
-        sha256 = "d70c88ab0c6a511594856ae2244d1bd70b8b7a4a42201a3569880f1dd2a3adec";
+        sha256 = "f9fc7641ef61e885510f5e5963c2948b9de1de597c63f781e9d3d6c9c8681ab4";
       };
 
       beamDeps = [ hackney jason plug plug_cowboy ];