diff --git a/pkgs/by-name/ol/oldsindhi/package.nix b/pkgs/by-name/ol/oldsindhi/package.nix
index c01d5b2393f1..d9c22e73536d 100644
--- a/pkgs/by-name/ol/oldsindhi/package.nix
+++ b/pkgs/by-name/ol/oldsindhi/package.nix
@@ -2,24 +2,22 @@
   lib,
   stdenvNoCC,
   fetchurl,
+  installFonts,
 }:
 
-stdenvNoCC.mkDerivation rec {
+stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "oldsindhi";
   version = "1.0";
 
   src = fetchurl {
-    url = "https://github.com/MihailJP/${pname}/releases/download/v${version}/OldSindhi-${version}.tar.xz";
+    url = "https://github.com/MihailJP/oldsindhi/releases/download/v${finalAttrs.version}/OldSindhi-${finalAttrs.version}.tar.xz";
     hash = "sha256-jOcl+mo6CJ9Lnn3nAUiXXHCJssovVgLoPrbGxj4uzQs=";
   };
 
-  installPhase = ''
-    runHook preInstall
+  nativeBuildInputs = [ installFonts ];
 
-    install -m444 -Dt $out/share/fonts/truetype *.ttf
-    install -m444 -Dt $out/share/doc/${pname}-${version} README *.txt
-
-    runHook postInstall
+  postInstall = ''
+    install -m444 -Dt $out/share/doc/${finalAttrs.pname}-${finalAttrs.version} README *.txt
   '';
 
   meta = {
@@ -32,4 +30,4 @@ stdenvNoCC.mkDerivation rec {
     ];
     platforms = lib.platforms.all;
   };
-}
+})