diff --git a/tools/update-plankton b/tools/update-plankton
index 535aa95..663fd6b 100755
--- a/tools/update-plankton
+++ b/tools/update-plankton
@@ -43,8 +43,8 @@ mkdir -p ${dir}
 mkdir /tmp/sandbox -p
 cd /tmp/sandbox
 ptk fetch node ${modules}
-schwamm --include=/tmp/sandboxplankton.swm.json --output=dump:logic-decl > ${dir}/plankton.d.ts
-schwamm --include=/tmp/sandboxplankton.swm.json --output=dump:logic-impl > ${dir}/plankton.js
+schwamm --include=/tmp/sandbox/plankton.swm.json --output=dump:logic-decl > ${dir}/plankton.d.ts
+schwamm --include=/tmp/sandbox/plankton.swm.json --output=dump:logic-impl > ${dir}/plankton.js
 exit
 
 mkdir -p ${dir}