f2c 20200916 -> 20210928 https://repology.org/metapackage/f2c/versions
attrpath: f2c
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript

[quotedUrls]
[quotedUrls] nothing found to replace
Diff after rewrites:
diff --git a/pkgs/development/tools/f2c/default.nix b/pkgs/development/tools/f2c/default.nix
index f235296308f..070a4eae0ba 100644
--- a/pkgs/development/tools/f2c/default.nix
+++ b/pkgs/development/tools/f2c/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation {
   pname = "f2c";
-  version = "20200916";
+  version = "20210928";
 
   src = fetchurl {
     url = "https://www.netlib.org/f2c/src.tgz";
-    sha256 = "0d8xfbv6dk4dz95qds7sd44b5hvara07f2g2c5g4xiwim9b7916l";
+    sha256 = "sha256-1IR0VqqRx05eYeIJd4DKasOyCGn66IZL+o3MZvZyHTU=";
   };
 
   makeFlags = [ "-f" "makefile.u" ];

Source url did not change.