stop using deprecated [project] in pixi.toml (#207)

use [workspace] instead, provided pixi is new enough

Co-authored-by: Christopher Rowley <github.com/cjdoris>

Author: cjdoris

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## Unreleased
+* Stop using deprecated `[project]` in `pixi.toml`.
+
 ## 0.2.34 (2026-02-16)
 * If the `env` preference (or `JULIA_CONDAPKG_ENV`) can now be a relative path, which is
   taken to be relative to the current Julia project.

src/resolve.jl

@@ -1047,13 +1047,10 @@ function resolve(;
                 end
                 # earlier versions of `pixi init` (pixi < v0.43.0) created
                 # [project] instead of [workspace]
-                pixiworkspace = if haskey(pixitoml, "project")
-                    pixitoml["project"]
-                else
-                    pixitoml["workspace"]
-                end
+                pixiworkspacekey = haskey(pixitoml, "project") ? "project" : "workspace"
+                pixiworkspace = pixitoml[pixiworkspacekey]
                 pixitoml = Dict{String,Any}(
-                    "project" => Dict{String,Any}(
+                    pixiworkspacekey => Dict{String,Any}(
                         "name" => ".CondaPkg",
                         "description" => "automatically generated by CondaPkg.jl",
                         "platforms" => pixiworkspace["platforms"],