ocrad 0.27 -> 0.29 https://repology.org/project/ocrad/versions
attrpath: ocrad
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/graphics/ocrad/default.nix b/pkgs/applications/graphics/ocrad/default.nix
index 8eae4fda5f8b..350a0222a741 100644
--- a/pkgs/applications/graphics/ocrad/default.nix
+++ b/pkgs/applications/graphics/ocrad/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "ocrad";
-  version = "0.27";
+  version = "0.29";
 
   src = fetchurl {
     url = "mirror://gnu/ocrad/${pname}-${version}.tar.lz";
-    sha256 = "0divffvcaim89g4pvqs8kslbcxi475bcl3b4ynphf284k9zfdgx9";
+    sha256 = "sha256-ESAMxrC3uhaISnLcy1jvaU96omzSsgQeVVWA8GTS2ek=";
   };
 
   nativeBuildInputs = [ lzip /* unpack */ ];

Received ExitFailure 1 when running
Raw command: /nix/store/3nqhcyc7vid1npgcd0m7arg5sn325nhz-nix-2.12.0/bin/nix-build --option sandbox true --arg config "{ allowBroken = true; allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A ocrad
nix build failed.
AR = ar
CPPFLAGS = 
CXXFLAGS = -Wall -W -O2
LDFLAGS = 
ARFLAGS = -rcs
LIBS = -lpng
MAKEINFO = makeinfo
OK. Now you can run make.
If make fails, check that the PNG library libpng is correctly installed
(see INSTALL).
@nix { "action": "setPhase", "phase": "buildPhase" }
Running phase: buildPhase
build flags: SHELL=/nix/store/087167dfxal194pm54cmcbbxsfy3cjgn-bash-5.2p26/bin/bash
g++  -Wall -W -O2 -c -o common.o common.cc
g++  -Wall -W -O2 -c -o segment.o segment.cc
g++  -Wall -W -O2 -c -o mask.o mask.cc
g++  -Wall -W -O2 -c -o rational.o rational.cc
g++  -Wall -W -O2 -c -o rectangle.o rectangle.cc
g++  -Wall -W -O2 -c -o track.o track.cc
g++  -Wall -W -O2 -c -o iso_8859.o iso_8859.cc
g++  -Wall -W -O2 -c -o ucs.o ucs.cc
g++  -Wall -W -O2 -c -o user_filter.o user_filter.cc
g++  -Wall -W -O2 -c -o page_image.o page_image.cc
g++  -Wall -W -O2 -c -o page_image_io.o page_image_io.cc
g++  -Wall -W -O2 -c -o png_io.o png_io.cc
png_io.cc:27:10: fatal error: png.h: No such file or directory
   27 | #include <png.h>
      |          ^~~~~~~
compilation terminated.
make: *** [Makefile:71: png_io.o] Error 1