diff --git a/pkgs/by-name/in/inspectrum/package.nix b/pkgs/by-name/in/inspectrum/package.nix
index 2e6a8cb81eea..0920670493dd 100644
--- a/pkgs/by-name/in/inspectrum/package.nix
+++ b/pkgs/by-name/in/inspectrum/package.nix
@@ -21,11 +21,17 @@ gnuradioMinimal.pkgs.mkDerivation rec {
     sha256 = "sha256-yY2W2hQpj8TIxiQBSbQHq0J16n74OfIwMDxFt3mLZYc=";
   };
 
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail "cmake_minimum_required(VERSION 3.1)" "cmake_minimum_required(VERSION 3.10)"
+  '';
+
   nativeBuildInputs = [
     cmake
     qt5.wrapQtAppsHook
     pkg-config
   ];
+
   buildInputs = [
     fftwFloat
     liquid-dsp