diff --git a/src/builders/nodejs/granular/default.nix b/src/builders/nodejs/granular/default.nix
index b8f98edd..c1f9d1a4 100644
--- a/src/builders/nodejs/granular/default.nix
+++ b/src/builders/nodejs/granular/default.nix
@@ -18,7 +18,6 @@
   getCyclicDependencies, # name: version: -> [ {name=; version=; } ]
   getDependencies, # name: version: -> [ {name=; version=; } ]
   getSource, # name: version: -> store-path
-  buildPackageWithOtherBuilder, # { builder, name, version }: -> drv
   # Attributes
   subsystemAttrs, # attrset
   defaultPackageName, # string
@@ -32,10 +31,6 @@
   # Example:
   #   produceDerivation name (mkDerivation {...})
   produceDerivation,
-  # Custom Options: (parametrize builder behavior)
-  # These can be passed by the user via `builderArgs`.
-  # All options must provide default
-  standalonePackageNames ? [],
   nodejs ? null,
   ...
 } @ args: let
diff --git a/src/default.nix b/src/default.nix
index 1b00e10a..a8fb0c87 100644
--- a/src/default.nix
+++ b/src/default.nix
@@ -258,37 +258,9 @@
         conditionalOverrides = packageOverrides;
       };
 
-    buildPackageWithOtherBuilder = {
-      builder,
-      name,
-      version,
-      inject ? {},
-    }: let
-      subDreamLockLoaded = utils.readDreamLock {
-        dreamLock =
-          utils.dreamLock.getSubDreamLock dreamLock name version;
-      };
-    in
-      callBuilder {
-        inherit
-          builder
-          builderArgs
-          fetchedSources
-          inject
-          sourceOverrides
-          packageOverrides
-          ;
-
-        dreamLock =
-          subDreamLockLoaded.lock;
-
-        outputs = allOutputs;
-      };
-
     outputs = builder (builderArgs
       // {
         inherit
-          buildPackageWithOtherBuilder
           produceDerivation
           dreamLock
           ;
diff --git a/src/templates/builders/default.nix b/src/templates/builders/default.nix
index bdf5f49b..ca2918a7 100644
--- a/src/templates/builders/default.nix
+++ b/src/templates/builders/default.nix
@@ -13,11 +13,13 @@
   getCyclicDependencies, # name: version: -> [ {name=; version=; } ]
   getDependencies, # name: version: -> [ {name=; version=; } ]
   getSource, # name: version: -> store-path
-  buildPackageWithOtherBuilder, # { builder, name, version }: -> drv
+  # to get information about the original source spec
+  getSourceSpec, # name: version: -> {type="git"; url=""; hash="";}
   # Attributes
   subsystemAttrs, # attrset
   defaultPackageName, # string
   defaultPackageVersion, # string
+  # all existing package names and versions
   # attrset of pname -> versions,
   # where versions is a list of version strings
   packageVersions,
@@ -26,10 +28,6 @@
   # Example:
   #   produceDerivation name (mkDerivation {...})
   produceDerivation,
-  # Custom Options: (parametrize builder behavior)
-  # These can be passed by the user via `builderArgs`.
-  # All options must provide default
-  standalonePackageNames ? [],
   ...
 } @ args: let
   b = builtins;