diff --git a/bin/cosmocc b/bin/cosmocc
index 3c9f907a4..a353be7b6 100755
--- a/bin/cosmocc
+++ b/bin/cosmocc
@@ -180,7 +180,7 @@ if [ ! -d "$COSMO" ]; then
 fi
 
 if [ "$1" = "--update" ]; then
-  cd /opt/cosmo || exit
+  cd $COSMO || exit
   if GIT=$(command -v git); then
     echo "running git pull on cosmo..." >&2
     "$GIT" pull --quiet || exit
diff --git a/bin/fatcosmocc b/bin/fatcosmocc
index 97952f21b..bfba3ccc7 100755
--- a/bin/fatcosmocc
+++ b/bin/fatcosmocc
@@ -149,7 +149,7 @@ else
 fi
 
 if [ "$1" = "--update" ]; then
-  cd /opt/cosmo || exit
+  cd $COSMO || exit
   if GIT=$(command -v git); then
     echo "running git pull on cosmo..." >&2
     "$GIT" pull --quiet || exit