Try to update netlify.toml

netlify.toml

@@ -1,8 +1,10 @@
 [build]
-  base    = "docs"
-  publish = "docs/public"
-  command = "curl -sL https://github.com/Keats/gutenberg/releases/download/v0.2.1/gutenberg-v0.2.1-x86_64-unknown-linux-gnu.tar.gz | tar zxvf - && /opt/build/repo/docs/gutenberg build"
+    base    = "docs"
+    publish = "docs/public"
+    command = "gutenberg build"
 
-[context.deploy-preview]
-  command = "curl -sL https://github.com/Keats/gutenberg/releases/download/v0.2.1/gutenberg-v0.2.1-x86_64-unknown-linux-gnu.tar.gz | tar zxvf - && /opt/build/repo/docs/gutenberg build --base-url $DEPLOY_PRIME_URL"
+[build.environment]
+    GUTENBERG_VERSION = "0.3.1"
 
+[context.deploy-preview]
+    command = "gutenberg build --base-url $DEPLOY_PRIME_URL"