diff --git a/install.sh b/install.sh
index 6a3f1d1..4fb6e79 100755
--- a/install.sh
+++ b/install.sh
@@ -1024,10 +1024,16 @@ main() {
     start_note="  started:   $SERVICE_NAME.service"
     if [ "$INSTALL_MODE" = "user" ]; then
         start_note="  started:   brig-containerd.service (systemd --user)"
+        # The line is for a startup file, so it says $HOME as written there. That
+        # also keeps a home path with a quote or a $ in it from breaking the line.
+        line_dir="$LAUNCH_DIR"
+        case "$LAUNCH_DIR" in
+            "$HOME"/*) line_dir="\$HOME${LAUNCH_DIR#"$HOME"}" ;;
+        esac
         case ":$PATH:" in
-            *":$LAUNCH_DIR:"*) ;;
+            *":$LAUNCH_DIR:"* | *":$LAUNCH_DIR/:"*) ;;
             *) grp_note="  path:      $LAUNCH_DIR is not on your PATH. Add it to run brig by name:
-               export PATH=\"$LAUNCH_DIR:\$PATH\"
+               export PATH=\"$line_dir:\$PATH\"
              Put that line in your shell's startup file to keep it.
              Do not add $BIN_DIR: the brig there runs without the launcher's environment.
 " ;;
diff --git a/tests/install-summary.sh b/tests/install-summary.sh
index b86435d..c49c392 100644
--- a/tests/install-summary.sh
+++ b/tests/install-summary.sh
@@ -71,8 +71,23 @@ ok "the summary names the bundle and its version"
 
 # The line to type, since the only other full paths on screen are under the
 # tree's bin directory, and a brig run from there has no launcher environment.
-grep -qF "export PATH=\"$T/home/.local/bin:\$PATH\"" "$T/out.log" \
-    || { cat "$T/out.log" >&2; fail "the summary does not give the PATH line"; }
+# shellcheck disable=SC2016
+grep -qF 'export PATH="$HOME/.local/bin:$PATH"' "$T/out.log" \
+    || { cat "$T/out.log" >&2; fail "the summary does not give the PATH line as a startup file has it"; }
 grep -qF "Do not add $T/home/.local/share/brig/data/bin:" "$T/out.log" \
     || { cat "$T/out.log" >&2; fail "the summary does not warn off the tree's bin directory"; }
 ok "the summary gives the PATH line"
+
+# A PATH entry written with a trailing slash is the same directory.
+if ! env -u XDG_CONFIG_HOME -u XDG_DATA_HOME \
+    HOME="$T/home" XDG_RUNTIME_DIR="$T/run" PATH="$T/stub:$T/home/.local/bin/:$PATH" \
+    INSTALL_BRIG_BUNDLE="$T/bundle.tar.gz" \
+    sh "$here/install.sh" > "$T/out2.log" 2>&1; then
+    cat "$T/out2.log" >&2
+    fail "the second install failed"
+fi
+if grep -q "is not on your PATH" "$T/out2.log"; then
+    cat "$T/out2.log" >&2
+    fail "a PATH with the launcher directory and a trailing slash was told to add it"
+fi
+ok "a trailing slash on the PATH entry counts"