diff --git a/specs/phoenix/runner b/specs/phoenix/runner
index ad0b4eb..924bf9c 100755
--- a/specs/phoenix/runner
+++ b/specs/phoenix/runner
@@ -81,12 +81,12 @@ sed -i "s/<APP_NAME>/$APP/g" "$BUILD/flake.nix"
 sed -i "s/username: \"postgres\"/username: \"$(whoami)\"/g" "$BUILD/config/dev.exs"
 
 # Create a new database cluster.
-nix develop "$BUILD" --command bash -c "pg_ctl initdb -D $BUILD/data"
+nix develop "$BUILD" --command bash -c "pg_ctl initdb -D $BUILD/db"
 
 # Append an additional rule to `.gitignore` to ignore the database cluster.
 cat <<EOF >> "$BUILD"/.gitignore
 # The default location of the generated database cluster.
-/data/
+/db/
 
 # Directory used by \`direnv\` to hold \`use flake\`-generated profiles.
 /.direnv/
diff --git a/specs/phoenix/template/README.md b/specs/phoenix/template/README.md
index 82e3943..7a02354 100644
--- a/specs/phoenix/template/README.md
+++ b/specs/phoenix/template/README.md
@@ -10,8 +10,8 @@ $ nix develop
 
 ## Quickstart
 
-An empty Postgres cluster is initialized at `/db`. To start the database, run
-the following:
+An empty Postgres cluster is initialized at `db`. To start the database, run the
+following:
 ```bash
 $ pg_ctl -D db -l db/logfile -o --unix_socket_directories=@phoenix start
 ```
diff --git a/specs/postgres/runner b/specs/postgres/runner
index 069e294..70145fc 100755
--- a/specs/postgres/runner
+++ b/specs/postgres/runner
@@ -43,7 +43,7 @@ trap cleanup EXIT
 cp -r template/* "$BUILD"
 
 # Create a new database cluster.
-nix develop "$BUILD" --command bash -c "pg_ctl initdb -D $BUILD/data"
+nix develop "$BUILD" --command bash -c "pg_ctl initdb -D $BUILD/db"
 
 # Explicitly set permissions on all copied files.
 find "$BUILD" -type f -execdir chmod 644 {} +
diff --git a/specs/postgres/template/.gitignore b/specs/postgres/template/.gitignore
index 54fe298..c7d8a7a 100644
--- a/specs/postgres/template/.gitignore
+++ b/specs/postgres/template/.gitignore
@@ -1,2 +1,2 @@
 # The default location of the generated database cluster.
-/data/
+/db/
diff --git a/specs/postgres/template/README.md b/specs/postgres/template/README.md
index b2d29da..d7e634f 100644
--- a/specs/postgres/template/README.md
+++ b/specs/postgres/template/README.md
@@ -10,8 +10,8 @@ $ nix develop
 
 ## Quickstart
 
-An empty Postgres cluster is initialized at `/db`. To start the database, run
-the following:
+An empty Postgres cluster is initialized at `db`. To start the database, run the
+following:
 ```bash
 $ pg_ctl -D db -l db/logfile -o --unix_socket_directories=@postgres start
 ```