diff --git a/bootstrap/bootstrap.go b/bootstrap/bootstrap.go
index 8a9a5f8..64fa8e5 100644
--- a/bootstrap/bootstrap.go
+++ b/bootstrap/bootstrap.go
@@ -180,8 +180,10 @@ func toolDir(config interface{}) string {
 
 func pluginDeps(ctx blueprint.BottomUpMutatorContext) {
 	if pkg, ok := ctx.Module().(*goPackage); ok {
-		for _, plugin := range pkg.properties.PluginFor {
-			ctx.AddReverseDependency(ctx.Module(), nil, plugin)
+		if ctx.PrimaryModule() == ctx.Module() {
+			for _, plugin := range pkg.properties.PluginFor {
+				ctx.AddReverseDependency(ctx.Module(), nil, plugin)
+			}
 		}
 	}
 }
@@ -211,7 +213,7 @@ func isGoPluginFor(name string) func(blueprint.Module) bool {
 	}
 }
 
-func isBootstrapModule(module blueprint.Module) bool {
+func IsBootstrapModule(module blueprint.Module) bool {
 	_, isPackage := module.(*goPackage)
 	_, isBinary := module.(*goBinary)
 	return isPackage || isBinary
@@ -268,6 +270,9 @@ func newGoPackageModuleFactory(config *Config) func() (blueprint.Module, []inter
 }
 
 func (g *goPackage) DynamicDependencies(ctx blueprint.DynamicDependerModuleContext) []string {
+	if ctx.Module() != ctx.PrimaryModule() {
+		return nil
+	}
 	return g.properties.Deps
 }
 
@@ -297,6 +302,16 @@ func (g *goPackage) IsPluginFor(name string) bool {
 }
 
 func (g *goPackage) GenerateBuildActions(ctx blueprint.ModuleContext) {
+	// Allow the primary builder to create multiple variants.  Any variants after the first
+	// will copy outputs from the first.
+	if ctx.Module() != ctx.PrimaryModule() {
+		primary := ctx.PrimaryModule().(*goPackage)
+		g.pkgRoot = primary.pkgRoot
+		g.archiveFile = primary.archiveFile
+		g.testResultFile = primary.testResultFile
+		return
+	}
+
 	var (
 		name       = ctx.ModuleName()
 		hasPlugins = false
@@ -386,6 +401,9 @@ func newGoBinaryModuleFactory(config *Config, tooldir bool) func() (blueprint.Mo
 }
 
 func (g *goBinary) DynamicDependencies(ctx blueprint.DynamicDependerModuleContext) []string {
+	if ctx.Module() != ctx.PrimaryModule() {
+		return nil
+	}
 	return g.properties.Deps
 }
 
@@ -395,6 +413,14 @@ func (g *goBinary) InstallPath() string {
 }
 
 func (g *goBinary) GenerateBuildActions(ctx blueprint.ModuleContext) {
+	// Allow the primary builder to create multiple variants.  Any variants after the first
+	// will copy outputs from the first.
+	if ctx.Module() != ctx.PrimaryModule() {
+		primary := ctx.PrimaryModule().(*goBinary)
+		g.installPath = primary.installPath
+		return
+	}
+
 	var (
 		name            = ctx.ModuleName()
 		objDir          = moduleObjDir(ctx, g.config)
@@ -653,13 +679,15 @@ func (s *singleton) GenerateBuildActions(ctx blueprint.SingletonContext) {
 	var blueprintTools []string
 	ctx.VisitAllModulesIf(isBootstrapBinaryModule,
 		func(module blueprint.Module) {
-			binaryModule := module.(*goBinary)
+			if ctx.PrimaryModule(module) == module {
+				binaryModule := module.(*goBinary)
 
-			if binaryModule.properties.Tool_dir {
-				blueprintTools = append(blueprintTools, binaryModule.InstallPath())
-			}
-			if binaryModule.properties.PrimaryBuilder {
-				primaryBuilders = append(primaryBuilders, binaryModule)
+				if binaryModule.properties.Tool_dir {
+					blueprintTools = append(blueprintTools, binaryModule.InstallPath())
+				}
+				if binaryModule.properties.PrimaryBuilder {
+					primaryBuilders = append(primaryBuilders, binaryModule)
+				}
 			}
 		})
 
diff --git a/module_ctx.go b/module_ctx.go
index 28578e0..c992c0a 100644
--- a/module_ctx.go
+++ b/module_ctx.go
@@ -246,6 +246,24 @@ type BaseModuleContext interface {
 	// invalidated by future mutators.
 	WalkDeps(visit func(Module, Module) bool)
 
+	// PrimaryModule returns the first variant of the current module.  Variants of a module are always visited in
+	// order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from the
+	// Module returned by PrimaryModule without data races.  This can be used to perform singleton actions that are
+	// only done once for all variants of a module.
+	PrimaryModule() Module
+
+	// FinalModule returns the last variant of the current module.  Variants of a module are always visited in
+	// order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from all
+	// variants using VisitAllModuleVariants if the current module == FinalModule().  This can be used to perform
+	// singleton actions that are only done once for all variants of a module.
+	FinalModule() Module
+
+	// VisitAllModuleVariants calls visit for each variant of the current module.  Variants of a module are always
+	// visited in order by mutators and GenerateBuildActions, so the data created by the current mutator can be read
+	// from all variants if the current module == FinalModule().  Otherwise, care must be taken to not access any
+	// data modified by the current mutator.
+	VisitAllModuleVariants(visit func(Module))
+
 	// OtherModuleName returns the name of another Module.  See BaseModuleContext.ModuleName for more information.
 	// It is intended for use inside the visit functions of Visit* and WalkDeps.
 	OtherModuleName(m Module) string
@@ -309,24 +327,6 @@ type ModuleContext interface {
 	// Build creates a new ninja build statement.
 	Build(pctx PackageContext, params BuildParams)
 
-	// PrimaryModule returns the first variant of the current module.  Variants of a module are always visited in
-	// order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from the
-	// Module returned by PrimaryModule without data races.  This can be used to perform singleton actions that are
-	// only done once for all variants of a module.
-	PrimaryModule() Module
-
-	// FinalModule returns the last variant of the current module.  Variants of a module are always visited in
-	// order by mutators and GenerateBuildActions, so the data created by the current mutator can be read from all
-	// variants using VisitAllModuleVariants if the current module == FinalModule().  This can be used to perform
-	// singleton actions that are only done once for all variants of a module.
-	FinalModule() Module
-
-	// VisitAllModuleVariants calls visit for each variant of the current module.  Variants of a module are always
-	// visited in order by mutators and GenerateBuildActions, so the data created by the current mutator can be read
-	// from all variants if the current module == FinalModule().  Otherwise, care must be taken to not access any
-	// data modified by the current mutator.
-	VisitAllModuleVariants(visit func(Module))
-
 	// GetMissingDependencies returns the list of dependencies that were passed to AddDependencies or related methods,
 	// but do not exist.  It can be used with Context.SetAllowMissingDependencies to allow the primary builder to
 	// handle missing dependencies on its own instead of having Blueprint treat them as an error.
@@ -642,6 +642,18 @@ func (m *baseModuleContext) WalkDeps(visit func(child, parent Module) bool) {
 	m.visitingDep = depInfo{}
 }
 
+func (m *baseModuleContext) PrimaryModule() Module {
+	return m.module.group.modules[0].logicModule
+}
+
+func (m *baseModuleContext) FinalModule() Module {
+	return m.module.group.modules[len(m.module.group.modules)-1].logicModule
+}
+
+func (m *baseModuleContext) VisitAllModuleVariants(visit func(Module)) {
+	m.context.visitAllModuleVariants(m.module, visit)
+}
+
 func (m *baseModuleContext) AddNinjaFileDeps(deps ...string) {
 	m.ninjaFileDeps = append(m.ninjaFileDeps, deps...)
 }
@@ -695,18 +707,6 @@ func (m *moduleContext) Build(pctx PackageContext, params BuildParams) {
 	m.actionDefs.buildDefs = append(m.actionDefs.buildDefs, def)
 }
 
-func (m *moduleContext) PrimaryModule() Module {
-	return m.module.group.modules[0].logicModule
-}
-
-func (m *moduleContext) FinalModule() Module {
-	return m.module.group.modules[len(m.module.group.modules)-1].logicModule
-}
-
-func (m *moduleContext) VisitAllModuleVariants(visit func(Module)) {
-	m.context.visitAllModuleVariants(m.module, visit)
-}
-
 func (m *moduleContext) GetMissingDependencies() []string {
 	m.handledMissingDeps = true
 	return m.module.missingDeps