metar 2017-02-17 -> 20190227.1 https://repology.org/project/metar/versions
attrpath: metar
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
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/applications/misc/metar/default.nix b/pkgs/applications/misc/metar/default.nix
index d1edfb6a761f..4e666d08aff6 100644
--- a/pkgs/applications/misc/metar/default.nix
+++ b/pkgs/applications/misc/metar/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation {
   pname = "metar";
-  version = "unstable-2017-02-17";
+  version = "unstable-20190227.1";
 
   src = fetchFromGitHub {
     owner = "keesL";
     repo = "metar";
     rev = "20e9ca69faea330f6c2493b6829131c24cb55147";
-    sha256 = "1fgrlnpasqf1ihh9y6zy6mzzybqx0lxvh7gmv03rjdb55dr42dxj";
+    sha256 = "sha256-sjdBcitlNZkH2PUduDsFHS//fzX+G58gjMFhra6l+bk=";
   };
 
   buildInputs = [ curl ];

Source url did not change.