diff --git a/build.sh b/build.sh
index 77e1175..891bc11 100755
--- a/build.sh
+++ b/build.sh
@@ -10,7 +10,7 @@ files='
   src/4-control-structures.md
   src/5-functions.md
   src/6-structures.md
-  sec/7-interfaces.md
+  src/7-interfaces.md
   src/8-http.md
   src/9-testing.md
   src/10-cli-app.md
@@ -19,11 +19,11 @@ files='
   src/13-wiki.md
   src/14-webapp-abstractions.md
   src/15-conclusion.md
-  src/15-battlesnake.md
+  src/bonus-battlesnake.md
   src/GReeTZ.md
   src/other_work_by_the_author.md
 '
 
-rev=$(git rev-parse HEAD --short)
+rev=$(git rev-parse --short HEAD)
 
 pandoc -o getgoing-${rev}.epub $files