diff --git a/pkgs/by-name/cm/cm_unicode/package.nix b/pkgs/by-name/cm/cm_unicode/package.nix
index 239d0d9cbe5c..8d5751b9d25a 100644
--- a/pkgs/by-name/cm/cm_unicode/package.nix
+++ b/pkgs/by-name/cm/cm_unicode/package.nix
@@ -5,12 +5,12 @@
   installFonts,
 }:
 
-stdenvNoCC.mkDerivation rec {
+stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "cm-unicode";
   version = "0.7.0";
 
   src = fetchurl {
-    url = "mirror://sourceforge/cm-unicode/cm-unicode/${version}/${pname}-${version}-otf.tar.xz";
+    url = "mirror://sourceforge/cm-unicode/cm-unicode/${finalAttrs.version}/cm-unicode-${finalAttrs.version}-otf.tar.xz";
     hash = "sha256-VIp+vk1IYbEHW15wMrfGVOPqg1zBZDpgFx+jlypOHCg=";
   };
 
@@ -19,7 +19,7 @@ stdenvNoCC.mkDerivation rec {
   InstallPhase = ''
     runHook preInstall
 
-    install -m444 -Dt $out/share/doc/${pname}-${version}    README FontLog.txt
+    install -m444 -Dt $out/share/doc/$cm-unicode-${finalAttrs.version}    README FontLog.txt
 
     runHook postInstall
   '';
@@ -34,4 +34,4 @@ stdenvNoCC.mkDerivation rec {
     license = lib.licenses.ofl;
     platforms = lib.platforms.all;
   };
-}
+})