diff --git a/pkgs/by-name/bl/blackhole/package.nix b/pkgs/by-name/bl/blackhole/package.nix
index b84a1a42b8b1..fa3f1a861c34 100644
--- a/pkgs/by-name/bl/blackhole/package.nix
+++ b/pkgs/by-name/bl/blackhole/package.nix
@@ -7,15 +7,18 @@
   nix-update-script,
   channel ? "256ch",
 }:
+let
+  numChannels = lib.toIntBase10 (lib.removeSuffix "ch" channel);
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "blackhole";
-  version = "0.6.1";
+  version = "0.7.1";
 
   src = fetchFromGitHub {
     owner = "existentialaudio";
     repo = "BlackHole";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-jFKi5LJdTOMFa1mErH6WsjgCtLCKzwpgn2+T3Fp9MtQ=";
+    hash = "sha256-kuIaoXA0K7SFPXKFHqcilTbf1zn9Ol3JYVpnkFuQEZg=";
   };
 
   nativeBuildInputs = [
@@ -31,14 +34,14 @@ stdenv.mkDerivation (finalAttrs: {
     "-configuration"
     "Release"
     "PRODUCT_BUNDLE_IDENTIFIER=${finalAttrs.bundleId}"
-    "GCC_PREPROCESSOR_DEFINITIONS=$GCC_PREPROCESSOR_DEFINITIONS kDriver_Name=\\\"blackhole${channel}\\\" kPlugIn_BundleID=\\\"${finalAttrs.bundleId}\\\" kPlugIn_Icon=\\\"BlackHole.icns\\\""
+    "GCC_PREPROCESSOR_DEFINITIONS=$GCC_PREPROCESSOR_DEFINITIONS kNumber_Of_Channels=${toString numChannels} kDriver_Name=\\\"BlackHole\\\" kPlugIn_BundleID=\\\"${finalAttrs.bundleId}\\\" kPlugIn_Icon=\\\"BlackHole.icns\\\""
   ];
 
   installPhase = ''
     runHook preInstall
 
     mkdir -p $out/Library/Audio/Plug-Ins/HAL
-    mv Products/Release/BlackHole.driver $out/Library/Audio/Plug-Ins/HAL/Blackhole${channel}.driver
+    mv Products/Release/BlackHole.driver $out/Library/Audio/Plug-Ins/HAL/BlackHole${channel}.driver
 
     runHook postInstall
   '';