NixOS - Issue packaging neovim plugin from github - neovim

Question

I'm trying to add a neovim plugin that doesn't exist in nixpkgs yet (modes.nvim), but having trouble getting it to work.
I'm using NixOS 22.05, and Home Manager, and I am using the following to build this plugin:
pkgs.vimUtils.buildVimPlugin {
name = "modes-nvim";
src = pkgs.fetchFromGitHub {
owner = "mvllow";
repo = "modes.nvim";
rev = "3188692abf02a8838ec75e59d68c2ce3e4323f5c";
sha256 = "sha256-2QDpwQ9+F5t5gTR1KLVzRrvriwo5JUHatZEJnc0ojV8=";
};
}
Initially, I used lib.pkgs.fakeSha256 to get a "mismatched hash" error, and copy/pasted the has from that error message, so I think it's correct, though other things I've seen on the internet seem to have the SHA256 as a hex string, so not sure what's going on there.
When I run home-manager switch, I get the following error:
these 12 derivations will be built:
/nix/store/pna2lzjc3q56z59b2kfazzxi8m6swp8d-vimplugin-modes-nvim.drv
/nix/store/mnj1d881d8s57yj3y8wjy7i9nl3m089f-vimplugin-modes-nvim.drv
/nix/store/5l8vqvx2bbawkkj92s8qd0p5hw16pcmq-vim-pack-dir.drv
/nix/store/jgqf68sd50s79pydzs9154p509l5109v-hm_nviminit.vim.drv
/nix/store/rq8f75qr9ahrfr0hvp51inn19088bz5p-manifest.vim.drv
/nix/store/hbzm2xr6nv8mr2l9nrlf742fqdmw9nv3-neovim-0.7.2.drv
/nix/store/zks47ifk7njz1s8y7hvq357ac8z6azkd-neovim-0.7.2-fish-completions.drv
/nix/store/rkaa094vvyjcyy4v1zkh4f8xz64vqxas-cameron-fish-completions.drv
/nix/store/0073403x9b4wv13gm7a6bqy4765pi8g5-home-manager-files.drv
/nix/store/lxwpbhb6ryhwrff4cjyniff11843cf9x-home-manager-path.drv
/nix/store/xbbn44253wjh90md4hqrrc2wfpafkc55-activation-script.drv
/nix/store/ijwmv897xc2wlr1ij4a30vk4z154ikbf-home-manager-generation.drv
building '/nix/store/pna2lzjc3q56z59b2kfazzxi8m6swp8d-vimplugin-modes-nvim.drv'...
Sourcing vim-command-check-hook.sh
Using vimCommandCheckHook
Sourcing vim-gen-doc-hook
unpacking sources
unpacking source archive /nix/store/fcxyif8piqar9w9ynmi6ym71hw6zsy7a-source
source root is source
patching sources
configuring
no configure script, doing nothing
building
build flags: SHELL=/nix/store/iffl6dlplhv22i2xy7n1w51a5r631kmi-bash-5.1-p16/bin/bash
test -r dependencies/pack/vendor/start/plenary.nvim || git clone --depth=1 https://github.com/nvim-lua/plenary.nvim.git dependencies/pack/vendor/start/plenary.nvim
/nix/store/iffl6dlplhv22i2xy7n1w51a5r631kmi-bash-5.1-p16/bin/bash: line 1: git: command not found
make: *** [Makefile:7: install_dependencies] Error 127
error: builder for '/nix/store/pna2lzjc3q56z59b2kfazzxi8m6swp8d-vimplugin-modes-nvim.drv' failed with exit code 2;
last 10 log lines:
> unpacking source archive /nix/store/fcxyif8piqar9w9ynmi6ym71hw6zsy7a-source
> source root is source
> patching sources
> configuring
> no configure script, doing nothing
> building
> build flags: SHELL=/nix/store/iffl6dlplhv22i2xy7n1w51a5r631kmi-bash-5.1-p16/bin/bash
> test -r dependencies/pack/vendor/start/plenary.nvim || git clone --depth=1 https://github.com/nvim-lua/plenary.nvim.git dependencies/pack/vendor/start/plenary.nvim
> /nix/store/iffl6dlplhv22i2xy7n1w51a5r631kmi-bash-5.1-p16/bin/bash: line 1: git: command not found
> make: *** [Makefile:7: install_dependencies] Error 127
For full logs, run 'nix log /nix/store/pna2lzjc3q56z59b2kfazzxi8m6swp8d-vimplugin-modes-nvim.drv'.
error: 1 dependencies of derivation '/nix/store/mnj1d881d8s57yj3y8wjy7i9nl3m089f-vimplugin-modes-nvim.drv' failed to build
error: 1 dependencies of derivation '/nix/store/5l8vqvx2bbawkkj92s8qd0p5hw16pcmq-vim-pack-dir.drv' failed to build
error: 1 dependencies of derivation '/nix/store/jgqf68sd50s79pydzs9154p509l5109v-hm_nviminit.vim.drv' failed to build
error: 1 dependencies of derivation '/nix/store/rq8f75qr9ahrfr0hvp51inn19088bz5p-manifest.vim.drv' failed to build
error: 1 dependencies of derivation '/nix/store/0073403x9b4wv13gm7a6bqy4765pi8g5-home-manager-files.drv' failed to build
error: 1 dependencies of derivation '/nix/store/hbzm2xr6nv8mr2l9nrlf742fqdmw9nv3-neovim-0.7.2.drv' failed to build
error: 1 dependencies of derivation '/nix/store/ijwmv897xc2wlr1ij4a30vk4z154ikbf-home-manager-generation.drv' failed to build
It appears to be failing due to git not being found. Of course, I have git installed for me, but perhaps this command is being run in an environment that doesn't have access to my installed packages.
I'm very new to Nix and NixOS, so I'm not really sure how to begin fixing this issue. I've searched online for answers, but haven't found anything about this issue. Any advice is much appreciated.