nawk 2021-02-15 -> 20121220 https://repology.org/project/nawk/versions
attrpath: nawk
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/tools/text/nawk/default.nix b/pkgs/tools/text/nawk/default.nix
index 580d30a5833..b3497203861 100644
--- a/pkgs/tools/text/nawk/default.nix
+++ b/pkgs/tools/text/nawk/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "nawk";
-  version = "unstable-2021-02-15";
+  version = "unstable-20121220";
 
   src = fetchFromGitHub {
     owner = "onetrueawk";
     repo = "awk";
     rev = "c0f4e97e4561ff42544e92512bbaf3d7d1f6a671";
-    sha256 = "kQCvItpSJnDJMDvlB8ruY+i0KdjmAphRDqCKw8f0m/8=";
+    sha256 = "sha256-kQCvItpSJnDJMDvlB8ruY+i0KdjmAphRDqCKw8f0m/8=";
   };
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];

Source url did not change.