diff --git a/pkgs/by-name/sh/shntool/package.nix b/pkgs/by-name/sh/shntool/package.nix
index b0fc9a6bb4f0..fdd6919eb0ef 100644
--- a/pkgs/by-name/sh/shntool/package.nix
+++ b/pkgs/by-name/sh/shntool/package.nix
@@ -5,7 +5,7 @@
   flac,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   version = "3.0.10+git20130108.4ca41f4-1";
   pname = "shntool";
 
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     domain = "salsa.debian.org";
     owner = "debian";
     repo = "shntool";
-    rev = "debian/${version}";
+    rev = "debian/${finalAttrs.version}";
     sha256 = "sha256-Qn4LwVx34EhypiZDIxuveNhePigkuiICn1nBukoQf5Y=";
   };
 
@@ -24,13 +24,15 @@ stdenv.mkDerivation rec {
     ./function-pointer-type.patch
   ];
 
-  buildInputs = [ flac ];
-
   prePatch = ''
     additional_patches=$(grep -v '#' ./debian/patches/series | while read patch; do echo "./debian/patches/$patch"; done | tr '\n' ' ')
     patches="$patches $additional_patches"
   '';
 
+  buildInputs = [
+    flac
+  ];
+
   meta = {
     description = "Multi-purpose WAVE data processing and reporting utility";
     homepage = "https://packages.qa.debian.org/s/shntool.html";
@@ -38,4 +40,4 @@ stdenv.mkDerivation rec {
     platforms = lib.platforms.all;
     maintainers = with lib.maintainers; [ jcumming ];
   };
-}
+})