diff --git a/.circleci/config.yml b/.circleci/config.yml
index bafce2b0cc6d7..b09c8722b9e24 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -152,6 +152,8 @@ commands:
       - run:
           command: npm install
           working_directory: << parameters.working_directory >>
+          environment:
+            NUM_PAGES: << parameters.NUM_PAGES >>
       - run:
           command: npm run build
           working_directory: << parameters.working_directory >>
@@ -166,6 +168,8 @@ commands:
       - run:
           command: npm install
           working_directory: << parameters.working_directory >>
+          environment:
+            NUM_PAGES: << parameters.NUM_PAGES >>
       - run:
           command: npm run build
           working_directory: << parameters.working_directory >>
diff --git a/benchmarks/markdown_id/.nvmrc b/benchmarks/markdown_id/.nvmrc
new file mode 100644
index 0000000000000..48082f72f087c
--- /dev/null
+++ b/benchmarks/markdown_id/.nvmrc
@@ -0,0 +1 @@
+12
diff --git a/benchmarks/markdown_slug/.nvmrc b/benchmarks/markdown_slug/.nvmrc
new file mode 100644
index 0000000000000..48082f72f087c
--- /dev/null
+++ b/benchmarks/markdown_slug/.nvmrc
@@ -0,0 +1 @@
+12
diff --git a/benchmarks/markdown_table/.nvmrc b/benchmarks/markdown_table/.nvmrc
new file mode 100644
index 0000000000000..48082f72f087c
--- /dev/null
+++ b/benchmarks/markdown_table/.nvmrc
@@ -0,0 +1 @@
+12