work around a bug in pixi that disallows custom PyPI servers (#11331)

* exclude 0.68.0 to avoid the broken v7 format for now [skip-rtd]

* temporarily pin pixi in CI

* version formatting

* missing propagation of the pixi version [skip-rtd]

Author: keewis

.github/workflows/ci-additional.yaml

@@ -52,6 +52,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.67.1
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock

.github/workflows/ci.yaml

@@ -46,13 +46,16 @@ jobs:
 
     outputs:
       cache-key: ${{ steps.pixi-lock.outputs.cache-key }}
+      pixi-version: ${{ steps.pixi-lock.outputs.pixi-version }}
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.67.1
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock

.github/workflows/hypothesis.yaml

@@ -59,6 +59,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.67.1
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock

.github/workflows/upstream-dev-ci.yaml

@@ -66,6 +66,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.67.1
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock

pixi.toml

@@ -2,7 +2,7 @@
 preview = ["pixi-build"]
 channels = ["conda-forge", "nodefaults"]
 platforms = ["win-64", "linux-64", "osx-arm64"]
-requires-pixi = ">=0.63.2"
+requires-pixi = ">=0.63.2,!=0.68.0"
 
 [package]
 name = "xarray"