Readme update.

.README.md

 ### `argonix`
 
-This is a test environment manager/remote deployment tool for Argo. It provides
-a wrapper around various nix tools to override sources and provision
-dependencies. Additionally, it supports providing a remote target machine. It
-should be built using [argopkgs](https://xgitlab.cels.anl.gov/argo/argopkgs).
+wrapper around various nix tools to override sources and provision
+dependencies for argo. supports remote target machines.
+
+#### Install
+
+'stable' (the one tracked by argopkgs/master and used in CI):
+```
+nix-env -f argopkgs="https://xgitlab.cels.anl.gov/argo/argopkgs/-/archive/master/argopkgs-master.tar.gz" -iA argonix
+```
+
+bleeding:
+```
+nix-env -I argopkgs="https://xgitlab.cels.anl.gov/argo/argopkgs/-/archive/master/argopkgs-master.tar.gz" -f "https://xgitlab.cels.anl.gov/argo/argonix/-/archive/master/argonix-master.tar.gz" -iA argonix
+```
 
 #### Usage
 
@@ -17,6 +27,6 @@ argonix --help
 
 ### Hacking
 
-- see `default.nix`
+- `nix-shell` provides cabal-build, ghcid, hlint
 
-- edit `.README.md` in place of README.md and run ./shake.hs as a pre-commit hook.
+- edit `.README.md` in place of README.md, run ./shake.hs to generate.

README.md

 ### `argonix`
 
-This is a test environment manager/remote deployment tool for Argo. It
-provides a wrapper around various nix tools to override sources and
-provision dependencies. Additionally, it supports providing a remote
-target machine. It should be built using
-[argopkgs](https://xgitlab.cels.anl.gov/argo/argopkgs).
+wrapper around various nix tools to override sources and provision
+dependencies for argo. supports remote target machines.
+
+#### Install
+
+'stable' (the one tracked by argopkgs/master and used in CI):
+
+    nix-env -f argopkgs="https://xgitlab.cels.anl.gov/argo/argopkgs/-/archive/master/argopkgs-master.tar.gz" -iA argonix
+
+bleeding:
+
+    nix-env -I argopkgs="https://xgitlab.cels.anl.gov/argo/argopkgs/-/archive/master/argopkgs-master.tar.gz" -f "https://xgitlab.cels.anl.gov/argo/argonix/-/archive/master/argonix-master.tar.gz" -iA argonix
 
 #### Usage
 
@@ -15,40 +22,19 @@ argonix --help
 Output:
 
 ``` {.txt}
-argonix
-
-Usage: argonix [-v|--verbose] [-a|--provision_apps] [-r|--remote_build]
-               [--retreive RELATIVE_PATH] [--retreiveAs LOCAL_PATH]
-               [--target_machine USER@HOST] [--argotk PATH] [--argopkgs PATH]
-               [--nrm PATH] [--containers PATH] [--libnrm PATH] [--amg PATH]
-               [--lammps PATH] [--qmcpack PATH] [--stream PATH] [--run COMMAND]
-  Argo environment provisioning/deployment/execution.
+Usage: argonix COMMAND
 
 Available options:
-  -v,--verbose             Enable verbose mode
-  -a,--provision_apps      Build and provision applications.
-  -r,--remote_build        Build on the remote rather than locally.
-  --retreive RELATIVE_PATH File/Folder to retreive from the remote machine.
-  --retreiveAs LOCAL_PATH  File/Folder to save retreived data as (locally).
-  --target_machine USER@HOST
-                           Target machine. defaults to localhost via forking.
-  --argotk PATH            argotk source folder override.
-  --argopkgs PATH          argopkgs source folder override.
-  --nrm PATH               nrm source folder override.
-  --containers PATH        containers source folder override.
-  --libnrm PATH            libnrm source folder override.
-  --amg PATH               amg source folder override.
-  --lammps PATH            lammps source folder override.
-  --qmcpack PATH           qmcpack source folder override.
-  --stream PATH            stream source folder override.
-  --run COMMAND            Command to run the environment instead of an
-                           interactive shell
+  COMMAND                  Type of operation to run.
   -h,--help                Show this help text
+
+Available commands:
+  build                    Run an argo-compatible nix-build.
+  shell                    Enter an argo-compatable nix-shell
 ```
 
 ### Hacking
 
--   see `default.nix`
+-   `nix-shell` provides cabal-build, ghcid, hlint
 
--   edit `.README.md` in place of README.md and run ./shake.hs as a
-    pre-commit hook.
+-   edit `.README.md` in place of README.md, run ./shake.hs to generate.