diff --git a/cmd/qrank-builder/build.go b/cmd/qrank-builder/build.go
index 88808d2..9e25c83 100644
--- a/cmd/qrank-builder/build.go
+++ b/cmd/qrank-builder/build.go
@@ -48,7 +48,7 @@ func Build(client *http.Client, dumps string, numWeeks int, s3 S3) error {
 	return nil
 }
 
-type SiteFileBuilder func(site WikiSite, ctx context.Context, dumps string, s3 S3) error
+type SiteFileBuilder func(site *WikiSite, ctx context.Context, dumps string, s3 S3) error
 
 func buildSiteFiles(ctx context.Context, filename string, builder SiteFileBuilder, dumps string, sites *map[string]WikiSite, s3 S3) error {
 	stored, err := ListStoredFiles(ctx, filename, s3)
@@ -69,7 +69,7 @@ func buildSiteFiles(ctx context.Context, filename string, builder SiteFileBuilde
 					if !more {
 						return nil
 					}
-					if err := builder(t, ctx, dumps, s3); err != nil {
+					if err := builder(&t, ctx, dumps, s3); err != nil {
 						return err
 					}
 				}
diff --git a/cmd/qrank-builder/build_test.go b/cmd/qrank-builder/build_test.go
index e3da676..f43d466 100644
--- a/cmd/qrank-builder/build_test.go
+++ b/cmd/qrank-builder/build_test.go
@@ -64,7 +64,7 @@ func TestBuildSiteFiles(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	buildFunc := func(site WikiSite, ctx context.Context, dumps string, s3 S3) error {
+	buildFunc := func(site *WikiSite, ctx context.Context, dumps string, s3 S3) error {
 		ymd := site.LastDumped.Format("20060102")
 		path := fmt.Sprintf("foobar/%s-%s-foobar.zst", site.Key, ymd)
 		s3.(*FakeS3).data[path] = []byte("fresh-" + ymd[:4])
diff --git a/cmd/qrank-builder/pagesignals.go b/cmd/qrank-builder/pagesignals.go
index 66e4f00..f528f47 100644
--- a/cmd/qrank-builder/pagesignals.go
+++ b/cmd/qrank-builder/pagesignals.go
@@ -26,7 +26,7 @@ import (
 )
 
 // BuildPageSignals builds the page_signals file for a WikiSite and puts it in S3 storage.
-func buildPageSignals(site WikiSite, ctx context.Context, dumps string, s3 S3) error {
+func buildPageSignals(site *WikiSite, ctx context.Context, dumps string, s3 S3) error {
 	ymd := site.LastDumped.Format("20060102")
 	destPath := fmt.Sprintf("page_signals/%s-%s-page_signals.zst", site.Key, ymd)
 	logger.Printf("building %s", destPath)
@@ -50,10 +50,10 @@ func buildPageSignals(site WikiSite, ctx context.Context, dumps string, s3 S3) e
 	group, groupCtx := errgroup.WithContext(ctx)
 	group.Go(func() error {
 		defer close(linesChan)
-		if err := processPagePropsTable(groupCtx, dumps, &site, linesChan); err != nil {
+		if err := processPagePropsTable(groupCtx, dumps, site, linesChan); err != nil {
 			return err
 		}
-		if err := processPageTable(groupCtx, dumps, &site, linesChan); err != nil {
+		if err := processPageTable(groupCtx, dumps, site, linesChan); err != nil {
 			return err
 		}
 		return nil
diff --git a/cmd/qrank-builder/pagesignals_test.go b/cmd/qrank-builder/pagesignals_test.go
index b30f035..225f051 100644
--- a/cmd/qrank-builder/pagesignals_test.go
+++ b/cmd/qrank-builder/pagesignals_test.go
@@ -28,8 +28,9 @@ func TestBuildPageSignals(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	for _, site := range []string{"rmwiki", "wikidatawiki"} {
-		if err := buildPageSignals((*sites)[site], ctx, dumps, s3); err != nil {
+	for _, siteKey := range []string{"rmwiki", "wikidatawiki"} {
+		site := (*sites)[siteKey]
+		if err := buildPageSignals(&site, ctx, dumps, s3); err != nil {
 			t.Fatal(err)
 		}
 	}