diff --git a/README.md b/README.md
index 96791aa..456c0de 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ would-reformat - automatic reformatting for emacs without being annoying
 
 # Installation
 
-- Change to the directory where you would want to use **would-reformat**:
+- Change to the directory where you want to use **would-reformat**:
   `$ cd ~/devel/my-project`
 - From that directory, call the script `install.sh` in the directory where
   you have **would-reformat** checked out:
@@ -13,8 +13,8 @@ would-reformat - automatic reformatting for emacs without being annoying
 This will do the following:
 
 - create the directory `~/devel/my-project/bin` if it does not exist
-- create `~/devel/my-project/_reformat-common.sh`,
-  `~/devel/my-project/do-reformat.sh`, and
+- create `~/devel/my-project/bin/_reformat-common.sh`,
+  `~/devel/my-project/bin/do-reformat.sh`, and
   `~/devel/my-project/bin/would-reformat.sh` as symlinks to files with
   the same names in `~/src/would-reformat`.
 - create `~/devel/my-project/.dir-locals.el` as a symlink to the file
@@ -27,12 +27,27 @@ will break, so don't do that.  If you rename the checkout, the symlinks will bre
 The directory `bin` with respect to `my-project` however is hardcoded
 (enhancements here are welcome).
 
-The script `install.sh` favors conservatism over being clever: for example,
+The script `install.sh` favors conservatism over cleverness: for example,
 if it finds the file `~/devel/my-project/bin/do-reformat.sh` then it
 checks whether it is a symlink to `~/src/would-reformat/do-reformat.sh`.
 If it is not, then it just prints a warning rather than attempting to correct
 the situation.
 
+# Troubleshooting
+
+## Running prettier is slow
+
+The scripts by default call `npx prettier` with some arguments.  If you call
+these scripts from a directory where there's a `node_modules/` directory with
+prettier and plugins, if necessary, installed, then `npx` should be fast
+enough.
+
+The solution, therefore, seems to be to say `yarn add --dev prettier` (or
+`npm install --dev prettier`) in the right place.
+
+(This seems to work for me, but it is admittedly still uncomfortably
+cargoculty.  There should be a more solid basis for this answer.)
+
+
 # Development
 
-