diff --git a/pkgs/by-name/co/compsize/package.nix b/pkgs/by-name/co/compsize/package.nix
index 1f100808d18d..a3689b475144 100644
--- a/pkgs/by-name/co/compsize/package.nix
+++ b/pkgs/by-name/co/compsize/package.nix
@@ -5,15 +5,15 @@
   btrfs-progs,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "compsize";
-  version = "1.5";
+  version = "1.5-unstable-2023-12-24";
 
   src = fetchFromGitHub {
     owner = "kilobyte";
     repo = "compsize";
-    rev = "v${version}";
-    sha256 = "sha256-OX41ChtHX36lVRL7O2gH21Dfw6GPPEClD+yafR/PFm8=";
+    rev = "d79eacf77abe3b799387bb8a4e07a18f1f1031e8";
+    sha256 = "sha256-pwHFllwTznhgZAGtGsULoLLBZlCllGt1eBmUKoJ/2wk=";
   };
 
   patches = [
@@ -26,10 +26,6 @@ stdenv.mkDerivation rec {
     "PREFIX=${placeholder "out"}"
   ];
 
-  preInstall = ''
-    mkdir -p $out/share/man/man8
-  '';
-
   meta = {
     description = "Find compression type/ratio on a file or set of files in the Btrfs filesystem";
     mainProgram = "compsize";