diff --git a/nix/agent.nix b/nix/agent.nix
index 6948b0a..884944d 100644
--- a/nix/agent.nix
+++ b/nix/agent.nix
@@ -1,7 +1,7 @@
 {buildGoModule}:
 buildGoModule {
   pname = "hp_agent";
-  version = builtins.replaceStrings ["\n"] [""] (builtins.readFile ../version);
+  version = (builtins.fromJSON (builtins.readFile ../package.json)).version;
   src = ../.;
   vendorHash = "sha256-G0kahv3mPTL/mxU2U+0IytJaFVPXMbMBktbLMfM0BO8=";
   ldflags = ["-s" "-w"];
diff --git a/nix/package.nix b/nix/package.nix
index 26cd6a0..7e46e18 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -9,7 +9,7 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "headplane";
-  version = builtins.replaceStrings ["\n"] [""] (builtins.readFile ../version);
+  version = (builtins.fromJSON (builtins.readFile ../package.json)).version;
   src = ../.;
 
   nativeBuildInputs = [