Blog post on GNU Guix

src/pages/blog/guix_notes.md

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+---
+layout: "../../layouts/BlogPost.astro"
+title: "First steps with GNU Guix"
+description: "The demes standard"
+pubDate: "September 5 2023"
+draft: true
+tags: [guix]
+---
+
+# Intro
+
+## Installation and setup
+
+Install from the shell script online.
+Be sure to say Yes to "do the SELinux setup".
+Reboot.
+
+After reboot:
+
+```sh
+guix pull
+``
+
+```
+guix pull: error: remounting /gnu/store writable: Permission denied
+```
+
+Googling this message yields little useful info.
+This has happened on 2 different machines.
+
+Instructions from [here](https://jfearn.fedorapeople.org/fdocs/en-US/Fedora/20/html/Security_Guide/sect-Security-Enhanced_Linux-Fixing_Problems-Allowing_Access_audit2allow.html), suggested [here](https://mastodon.social/@starlily/111013341929599928) didn't help:
+
+sudo grep guix /var/log/audit/audit.log|sudo audit2allow -R -M guixremount.te
+could not open interface info [/var/lib/sepolgen/interface_info]
+
+sudo semodule -i guixremount.te 
+libsemanage.semanage_pipe_data: Child process /usr/libexec/selinux/hll/te failed with code: 1. (No such file or directory).
+guixremount: libsemanage.semanage_pipe_data: Unable to execute /usr/libexec/selinux/hll/te : No such file or directory
+guixremount:  (No such file or directory).
+libsemanage.semanage_direct_commit: Failed to compile hll files into cil files.
+ (No such file or directory).
+semodule:  Failed!
+
+From [here](https://unix.stackexchange.com/questions/665410/how-to-install-selinux-policy-for-guix-daemon-service-on-fedora), tried the mods of /gnu/store.
+Then reboot...
+
+Failed
+
+## guix describe
+
+```sh
+guix describe -f channels
+``` 
+
+
+gives:
+
+```scheme
+(list (channel
+        (name 'guix)
+        (url "https://git.savannah.gnu.org/git/guix.git")
+        (branch "master")
+        (commit
+          "8e2f32cee982d42a79e53fc1e9aa7b8ff0514714")
+        (introduction
+          (make-channel-introduction
+            "9edb3f66fd807b096b48283debdcddccfea34bad"
+            (openpgp-fingerprint
+              "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA")))))
+```
+
+## guix shell
+
+```sh
+guix shell --export-manifest r r-tidyverse
+````
+
+gives:
+
+```scheme
+(specifications->manifest
+  (list "r" "r-tidyverse"))
+```
+
+### Weirdness
+
+If you don't specific `r` in the shell command, you end up with a shell that has no `R` binary!
+This is definitely an "explicit over implicit" way to manage dependencies.
+
+## Reproducing this environment later
+
+```sh
+guix time-machine -C channels.scm -- shell -m tidyverse.scm
+```
+
+### Notes
+
+This command can take a while to execute over wifi.
+