diff --git a/INSTALL.md b/INSTALL.md
index b407ab1..f02c54e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -12,9 +12,22 @@ version. If your distro has 1.1, see if you can grab 1.0 or 1.0.1 in some way,
 either through the distro package or by downloading OpenSSL manually from its
 website, or some alternative package manager such as GNU Guix.
 
-Install stack. To install stack, go to its website and follow the instructions.
-If you have some old version, such as one installed from FPComplete's old
-debian repo, you may need to upgrade it.
+Install dependency library development packages. It's very likely you already
+have them all installed, and if you're missing some, the build process will
+inform you. But it's still nice to have a list here. The list below isn't a
+complete list, it's just libraries that people have found missing while
+building, and let me know.
+
+- PostgreSQL client library
+- ZLib
+
+On Debian based distros, installation can be done like this:
+
+    $ sudo apt install libpq-dev zlib1g-dev
+
+Install stack. To install stack, go to its [website](https://haskellstack.org)
+and follow the instructions.  If you have some old version, such as one
+installed from FPComplete's old debian repo, you may need to upgrade it.
 
 Install Darcs. You can grab it from your distro, e.g.:
 
@@ -41,10 +54,13 @@ of writing, there are 4 of them (`hit-harder`, `hit-graph`, `hit-network` and
 
     $ darcs clone https://dev.seek-together.space/s/fr33domlover/r/ssh
 
-Some of those extra repos are at `hub.darcs.net` and some at
-`dev.seek-together.space/s/fr33domlover/r`, I'm sorry I'm not just listing the
-URLs here. These things have been changing often, but once they stabilize I
-will update the docs, and also make releases of all these extra libraries.
+Those extra repos should be found at the
+[Vervis project page](https://dev.seek-together.space/s/fr33domlover/p/vervis).
+If something is missing there, try my
+[Darcs Hub page](https://hub.darcs.net/fr33domlover). I'm sorry I'm not just
+listing the URLs here. These things have been changing often, but once they
+stabilize I will update the docs, and also make releases of all these extra
+libraries.
 
 Update `stack.yaml` to specify that path in the `packages` section if needed: