@antifuchs:asf.computer modifying exec-path is cool, but there's a few issues:

1. can't run programs indirectly: with Rust-analyzer and Clippy in exec-path, Eglot can run rust-analyser, but Rust-analyzer can't run cargo clippy, since the latter isn't in PATH
2. (not directly Emacs' fault) direnv.el and envrc.el, when they set exec-path, they first synchronize it with PATH, thus removing extra entries not present in PATH

here's what I do (and note that I put /usr/local/bin and other paths on there only for extremely legacy reasons & can probably just delete that):

(let ((new-exec-path (nconc
                      (list
                       "@emacsExecPath@"
                       "/run/current-system/sw/bin"
                       "/usr/local/bin"
                       (concat (getenv "HOME") "/.nix-profile/bin")
                       (concat (getenv "HOME") "/go/bin")
                       (concat (getenv "HOME") "/.cargo/bin"))
                       exec-path)))
  (setq exec-path new-exec-path)
  (setenv "PATH" (mapconcat 'identity exec-path ":")))

In reply to @antifuchs:asf.computer
I think the commonly done thing is to generate a .el file with substituteAll that sets exec-path to include the paths you need added and then load that in your init

In reply to @imperivohaace:matrix.org
I'm always compiling it seemingly

since an update, pinentryFlavor = "gtk2"; is no more. So I do as suggested

  programs = {
    gnupg = {
      agent = {
        enable = true;
        enableSSHSupport = true;
        # TODO: https://discourse.nixos.org/t/cant-get-gnupg-to-work-no-pinentry/15373/33
        # programs.gnupg.agent.pinentryFlavor' no longer,
        # programs.gnupg.agent.pinentryPackage instead
        # pinentryFlavor = "gtk2";
        pinentryPackage = pkgs.pinentry-gtk2;
      };
      dirmngr.enable = true;
    };
  };

but doesn't work on Emacs anyway. Any insights please?

since an update, pinentryFlavor = "gtk2"; is no more. So I do as suggested pinentryPackage = pkgs.pinentry-gtk2;

  programs = {
    gnupg = {
      agent = {
        enable = true;
        enableSSHSupport = true;
        # TODO: https://discourse.nixos.org/t/cant-get-gnupg-to-work-no-pinentry/15373/33
        # programs.gnupg.agent.pinentryFlavor' no longer,
        # programs.gnupg.agent.pinentryPackage instead
        # pinentryFlavor = "gtk2";
        pinentryPackage = pkgs.pinentry-gtk2;
      };
      dirmngr.enable = true;
    };
  };

but doesn't work on Emacs anyway. Any insights please?

For example, magit error

128 git … commit --
hint: Waiting for your editor to close the file...

WITH-EDITOR: 5648 OPEN /etc/nixos/.git/COMMIT_EDITMSG IN /etc/nixos
error: gpg failed to sign the data:
gpg: WARNING: unsafe ownership on homedir '/root/.gnupg'
[GNUPG:] KEY_CONSIDERED HASHHERE 2
[GNUPG:] BEGIN_SIGNING H8
[GNUPG:] PINENTRY_LAUNCHED 6008 gtk2:curses 1.3.1-unknown - dumb :0 - 0/0 0
gpg: signing failed: Inappropriate ioctl for device
[GNUPG:] FAILURE sign 83918950
gpg: signing failed: Inappropriate ioctl for device

fatal: failed to write commit object

  0 git … add -- profile/dev/guix.nix
  0 git … add -u -- profile/app/guix.nix
  0 git … add -u -- host/common/global/default.nix
  0 git … reset HEAD -- host/common/global/default.nix
Unstaged changes after reset:
M	flake.nix
M	host/common/global/default.nix
M	packages/default.nix
M	profile/dev/python.nix
M	profile/sys/prime.nix

  0 git … reset HEAD -- profile/app/guix.nix profile/dev/guix.nix
Unstaged changes after reset:
M	flake.nix
M	host/common/global/default.nix
M	packages/default.nix
D	profile/app/guix.nix
M	profile/dev/python.nix
M	profile/sys/prime.nix

  0 git … add -u -- profile/dev/python.nix
  0 git … commit --no-gpg-sign --no-edit --fixup\=899df3d --
[local f0503fc] fixup! add: python313, python-ls-server.all
 1 file changed, 2 insertions(+)

  1 git … rebase -i --autosquash --autostash --keep-empty 899df3d\^
Created autostash: 2fd7638
hint: Waiting for your editor to close the file...
error: gpg failed to sign the data:
gpg: WARNING: unsafe ownership on homedir '/root/.gnupg'
[GNUPG:] KEY_CONSIDERED HASHHERE 2
[GNUPG:] BEGIN_SIGNING H8
[GNUPG:] PINENTRY_LAUNCHED 13568 gtk2:curses 1.3.1-unknown - dumb :0 - 0/0 0
gpg: signing failed: Inappropriate ioctl for device
[GNUPG:] FAILURE sign 83918950
gpg: signing failed: Inappropriate ioctl for device

error: failed to write commit object
hint: Could not execute the todo command
hint:
hint:     fixup f0503fcffebd27d76713e67a033eea09dcf18d66 fixup! add: python313, python-ls-server.all
hint:
hint: It has been rescheduled; To edit the command before continuing, please
hint: edit the todo list first:
hint:
hint:     git rebase --edit-todo
hint:     git rebase --continue

run git … commit --
hint: Waiting for your editor to close the file...

WITH-EDITOR: 13931 OPEN /etc/nixos/.git/COMMIT_EDITMSG IN /etc/nixos

since an update, pinentryFlavor = "gtk2"; is no more. So I do as suggested pinentryPackage = pkgs.pinentry-gtk2;

  programs = {
    gnupg = {
      agent = {
        enable = true;
        enableSSHSupport = true;
        # TODO: https://discourse.nixos.org/t/cant-get-gnupg-to-work-no-pinentry/15373/33
        # programs.gnupg.agent.pinentryFlavor' no longer,
        # programs.gnupg.agent.pinentryPackage instead
        # pinentryFlavor = "gtk2";
        pinentryPackage = pkgs.pinentry-gtk2;
      };
      dirmngr.enable = true;
    };
  };

but doesn't work on Emacs magit anyway. Any insights please?