* Move the implementation of the ‘derivation’ primop into a separate

file.

src/libexpr/primops.cc

@@ -1099,29 +1099,7 @@ void EvalState::createBaseEnv()
 
     /* Add a wrapper around the derivation primop that computes the
        `drvPath' and `outPath' attributes lazily. */
-    string s = "attrs: \
-      let \
-        strict = derivationStrict attrs; \
-        attrValues = attrs: \
-          map (name: builtins.getAttr name attrs) (builtins.attrNames attrs); \
-        outputToAttrListElement = output: \
-          { \
-            name = output; \
-            value = attrs // { \
-              outPath = builtins.getAttr (output + \"Path\") strict; \
-              drvPath = strict.drvPath; \
-              type = \"derivation\"; \
-              currentOutput = output; \
-            } // outputsAttrs // { all = allList; }; \
-          }; \
-        outputsList = if attrs ? outputs then \
-          map outputToAttrListElement attrs.outputs else \
-          [ (outputToAttrListElement \"out\") ]; \
-        outputsAttrs = builtins.listToAttrs outputsList; \
-        allList = attrValues outputsAttrs; \
-        head = if attrs ? outputs then builtins.head attrs.outputs else \"out\"; \
-      in builtins.getAttr head outputsAttrs";
-    mkThunk_(v, parseExprFromString(s, "/"));
+    mkThunk_(v, parseExprFromFile(findFile("nix/derivation.nix")));
     addConstant("derivation", v);
 
     /* Now that we've added all primops, sort the `builtins' attribute