Leiningen: referring to another project on local disc

I'm trying to reference one of my leiningen projects from another, and not
succeeding. My error must be simple and obvious...

Essentially the projects 'poker' and 'testgen' are both in
/home/simon/workspace, and both are standard leiningen projects using just
the default project template. I've done 'lein uberjar' in testgen, so there
are the following jars:

simon [ at ] engraver:~/workspace/poker$ ls -l
/home/simon/workspace/testgen/target/
total 3588
drwxr-xr-x 2 simon simon 4096 Apr 2 20:04 classes
-rw-r--r-- 1 simon simon 5 Apr 6 00:06 repl-port
drwxr-xr-x 2 simon simon 4096 Apr 2 20:04 stale
-rw-r--r-- 1 simon simon 11226 Apr 6 00:10 testgen-0.1.0-SNAPSHOT.jar
-rw-r--r-- 1 simon simon 3646079 Apr 6 00:10
testgen-0.1.0-SNAPSHOT-standalone.jar

In poker/project.clj I've done the following (added lines highlighted):

(defproject poker "0.1.0-SNAPSHOT"
:description "Poker scoring kata"
:url "http://example.com/FIXME"
:license {:name "Eclipse Public License"
:url "http://www.eclipse.org/legal/epl-v10.html"}
:repositories [["testgen"
"file:///home/simon/workspace/testgen/target"]]
:dependencies [[org.clojure/clojure "1.5.1"]
[testgen "0.1.0-SNAPSHOT"]
])

When I try to run lein repl, I get the following:

simon [ at ] engraver:~/workspace/poker$ lein repl
Could not find artifact testgen:testgen:jar:0.1.0-SNAPSHOT in clojars
(https://clojars.org/repo/)
Could not find artifact testgen:testgen:jar:0.1.0-SNAPSHOT in testgen
(file:///home/simon/workspace/testgen/target)
This could be due to a typo in :dependencies or network issues.

So clearly lein is failing to recognise the jar file(s) as the artefact
it's looking for. What do I need to do differently? Do I need a pom file,
and if so what should be in it?

Cheers

Simon