files for devenv framework not found error

Cargo.toml

[package]
name = "testing_compiler_error"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
sqlx = { version = "0.6", features = [ "runtime-tokio-native-tls" , "postgres" ] }

devenv.lock

{
  "nodes": {
    "devenv": {
      "locked": {
        "dir": "src/modules",
        "lastModified": 1679514134,
        "narHash": "sha256-x6wKyiOuJJW2phDbCpmSYjRlCe4Yva4r2nkqc7aNFsI=",
        "owner": "cachix",
        "repo": "devenv",
        "rev": "a02418232d775e99ca349e1c8f71400aa1dd903c",
        "type": "github"
      },
      "original": {
        "dir": "src/modules",
        "owner": "cachix",
        "repo": "devenv",
        "type": "github"
      }
    },
    "flake-compat": {
      "flake": false,
      "locked": {
        "lastModified": 1673956053,
        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
        "owner": "edolstra",
        "repo": "flake-compat",
        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
        "type": "github"
      },
      "original": {
        "owner": "edolstra",
        "repo": "flake-compat",
        "type": "github"
      }
    },
    "flake-utils": {
      "locked": {
        "lastModified": 1667395993,
        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
        "owner": "numtide",
        "repo": "flake-utils",
        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
        "type": "github"
      },
      "original": {
        "owner": "numtide",
        "repo": "flake-utils",
        "type": "github"
      }
    },
    "gitignore": {
      "inputs": {
        "nixpkgs": [
          "pre-commit-hooks",
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1660459072,
        "narHash": "sha256-8DFJjXG8zqoONA1vXtgeKXy68KdJL5UaXR8NtVMUbx8=",
        "owner": "hercules-ci",
        "repo": "gitignore.nix",
        "rev": "a20de23b925fd8264fd7fad6454652e142fd7f73",
        "type": "github"
      },
      "original": {
        "owner": "hercules-ci",
        "repo": "gitignore.nix",
        "type": "github"
      }
    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1679553901,
        "narHash": "sha256-OhmJc18XNIj0wVC4ZoPnCVoY3SGfcPxaeKJOz1WHo5M=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "09ad6a72359f6aff0f96ce8e4d1ec2d1271ad15d",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixpkgs-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "nixpkgs-stable": {
      "locked": {
        "lastModified": 1678872516,
        "narHash": "sha256-/E1YwtMtFAu2KUQKV/1+KFuReYPANM2Rzehk84VxVoc=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "9b8e5abb18324c7fe9f07cb100c3cd4a29cda8b8",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-22.11",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "pre-commit-hooks": {
      "inputs": {
        "flake-compat": "flake-compat",
        "flake-utils": "flake-utils",
        "gitignore": "gitignore",
        "nixpkgs": [
          "nixpkgs"
        ],
        "nixpkgs-stable": "nixpkgs-stable"
      },
      "locked": {
        "lastModified": 1678976941,
        "narHash": "sha256-skNr08frCwN9NO+7I77MjOHHAw+L410/37JknNld+W4=",
        "owner": "cachix",
        "repo": "pre-commit-hooks.nix",
        "rev": "32b1dbedfd77892a6e375737ef04d8efba634e9e",
        "type": "github"
      },
      "original": {
        "owner": "cachix",
        "repo": "pre-commit-hooks.nix",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "devenv": "devenv",
        "nixpkgs": "nixpkgs",
        "pre-commit-hooks": "pre-commit-hooks"
      }
    }
  },
  "root": "root",
  "version": 7
}

devenv.nix

{ pkgs, ... }:

{
  # https://devenv.sh/basics/
  env.GREET = "devenv";
  env.DATABASE_URL="postgres://postgres:password@localhost/test";
  

  # https://devenv.sh/packages/
  packages = [ 
    pkgs.helix
    pkgs.git
    pkgs.jq
    pkgs.httpie
    pkgs.yarn
    pkgs.curl
    pkgs.fzf
    pkgs.just
    pkgs.openssl
  ];

  # https://devenv.sh/scripts/
  scripts.hello.exec = "echo hello from $GREET";
  scripts.axum_test_runner.exec = "RUST_LOG=info cargo run";

  enterShell = ''
    cargo --version
    npm --version
    http --version
    yarn --version
    curl --version
    git --version
    jq --version
  '';

  # https://devenv.sh/languages/
  languages.nix.enable = true;
  languages.python.enable = true;
  languages.rust.enable = true;	
  languages.typescript.enable = true;
  languages.javascript.enable = true;


  # https://devenv.sh/pre-commit-hooks/
  # pre-commit.hooks.shellcheck.enable = true;

  # https://devenv.sh/processes/
  # processes.ping.exec = "ping example.com";
  

  # See full reference at https://devenv.sh/reference/options/
}

devenv.yaml

inputs:
  nixpkgs:
    url: github:NixOS/nixpkgs/nixpkgs-unstable

main.rs

use sqlx::postgres::PgPoolOptions;
// use sqlx::mysql::MySqlPoolOptions;
// etc.

#[async_std::main]
// or #[tokio::main]
// or #[actix_web::main]
async fn main() -> Result<(), sqlx::Error> {
    // Create a connection pool
    //  for MySQL, use MySqlPoolOptions::new()
    //  for SQLite, use SqlitePoolOptions::new()
    //  etc.
    let pool = PgPoolOptions::new()
        .max_connections(5)
        .connect("postgres://postgres:password@localhost/test")
        .await?;

    // Make a simple query to return the given parameter (use a question mark `?` instead of `$1` for MySQL)
    let row: (i64,) = sqlx::query_as("SELECT $1")
        .bind(150_i64)
        .fetch_one(&pool)
        .await?;

    assert_eq!(row.0, 150);

    Ok(())
}

shell.nix

{
  devShells.default = pkgs.mkShell {
    buildInputs = with pkgs; [ cargo python ];
  };
}