tesseract: fix passthru override (#440938)

pkgs/applications/graphics/tesseract/wrapper.nix

@@ -58,34 +58,42 @@ let
   passthru = { inherit tesseractBase languages tessdata; };
 
   # Only run test when all languages are available
-  test = lib.optionalAttrs (enableLanguages == null) {
-    tests.default =
-      runCommand "tesseract-test-ocr"
-        {
-          buildInputs = [
-            tesseractWithData
-            imagemagick
-          ];
-        }
-        ''
-          text="hello nix"
+  test =
+    runCommand "tesseract-test-ocr"
+      {
+        buildInputs = [
+          tesseractWithData
+          imagemagick
+        ];
+      }
+      ''
+        text="hello nix"
 
-          convert -size 400x40 xc:white -font 'DejaVu-Sans' -pointsize 20 \
-            -fill black -annotate +5+20 "$text" /tmp/test-img.png 2>/dev/null
-          ocrResult=$(tesseract /tmp/test-img.png - | tr -d "\f")
+        convert -size 400x40 xc:white -font 'DejaVu-Sans' -pointsize 20 \
+          -fill black -annotate +5+20 "$text" /tmp/test-img.png 2>/dev/null
+        ocrResult=$(tesseract /tmp/test-img.png - | tr -d "\f")
 
-          if [[ $ocrResult != $text ]]; then
-            echo "OCR test failed"
-            echo "expected: '$text'"
-            echo "actual: '$ocrResult'"
-            exit 1
-          fi
-          touch $out
-        '';
-  };
+        if [[ $ocrResult != $text ]]; then
+          echo "OCR test failed"
+          echo "expected: '$text'"
+          echo "actual: '$ocrResult'"
+          exit 1
+        fi
+        touch $out
+      '';
 
   tesseract =
-    (if enableLanguages == [ ] then tesseractBase else tesseractWithData) // passthru // test;
+    (if enableLanguages == [ ] then tesseractBase else tesseractWithData).overrideAttrs
+      (old: {
+        passthru =
+          (old.passthru or { })
+          // passthru
+          // lib.optionalAttrs (enableLanguages == null) {
+            tests = (old.passthru.tests or { }) // {
+              default = test;
+            };
+          };
+      });
 in
 if enableLanguagesHash == null then
   tesseract