ExternalDerivationBuilder: Emit a version field

edolstra · edolstra · commit e9c5d721d871 · 2025-10-06T11:36:26.000+02:00
diff --git a/src/libstore/include/nix/store/globals.hh b/src/libstore/include/nix/store/globals.hh
@@ -1419,7 +1419,8 @@ public:
               "system": "aarch64-linux",
               "tmpDir": "/private/tmp/nix-build-hello-2.12.2.drv-0/build",
               "tmpDirInSandbox": "/build",
-              "topTmpDir": "/private/tmp/nix-build-hello-2.12.2.drv-0"
+              "topTmpDir": "/private/tmp/nix-build-hello-2.12.2.drv-0",
+              "version": 1
             }
         )",
         {},   // aliases
diff --git a/src/libstore/unix/build/external-derivation-builder.cc b/src/libstore/unix/build/external-derivation-builder.cc
@@ -49,6 +49,7 @@ struct ExternalDerivationBuilder : DerivationBuilderImpl
 
         auto json = nlohmann::json::object();
 
+        json.emplace("version", 1);
         json.emplace("builder", drv.builder);
         {
             auto l = nlohmann::json::array();

Original file line number	Diff line number	Diff line change
`@@ -49,6 +49,7 @@ struct ExternalDerivationBuilder : DerivationBuilderImpl`
`49`	`49`
`50`	`50`	`auto json = nlohmann::json::object();`
`51`	`51`
	`52`	`+ json.emplace("version", 1);`
`52`	`53`	`json.emplace("builder", drv.builder);`
`53`	`54`	`{`
`54`	`55`	`auto l = nlohmann::json::array();`