diff --git a/.github/workflows/ci-additional.yaml b/.github/workflows/ci-additional.yaml
index 4d95ad305bf..ee21bf6f559 100644
--- a/.github/workflows/ci-additional.yaml
+++ b/.github/workflows/ci-additional.yaml
@@ -14,7 +14,7 @@ concurrency:
 
 env:
   FORCE_COLOR: 3
-  PIXI_VERSION: "v0.62.2"
+  PIXI_VERSION: "v0.63.1"
 
 jobs:
   detect-ci-trigger:
@@ -37,7 +37,7 @@ jobs:
   cache-pixi-lock:
     uses: ./.github/workflows/cache-pixi-lock.yml
     with:
-      pixi-version: "v0.62.2" # keep in sync with env var above
+      pixi-version: "v0.63.1" # keep in sync with env var above
   doctest:
     name: Doctests
     runs-on: "ubuntu-latest"
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 2547cd32f36..94d46b42def 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,7 +14,7 @@ concurrency:
 
 env:
   FORCE_COLOR: 3
-  PIXI_VERSION: "v0.62.2"
+  PIXI_VERSION: "v0.63.1"
 
 jobs:
   detect-ci-trigger:
@@ -38,7 +38,7 @@ jobs:
   cache-pixi-lock:
     uses: ./.github/workflows/cache-pixi-lock.yml
     with:
-      pixi-version: "v0.62.2" # keep in sync with env var above
+      pixi-version: "v0.63.1" # keep in sync with env var above
   test:
     name: "${{ matrix.os }} | ${{ matrix.pixi-env }}${{ matrix.pytest-addopts && format(' ({0})', matrix.pytest-addopts) || '' }}"
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/hypothesis.yaml b/.github/workflows/hypothesis.yaml
index 19f38a13cea..b817937a8bc 100644
--- a/.github/workflows/hypothesis.yaml
+++ b/.github/workflows/hypothesis.yaml
@@ -13,7 +13,7 @@ on:
 
 env:
   FORCE_COLOR: 3
-  PIXI_VERSION: "v0.62.2"
+  PIXI_VERSION: "v0.63.1"
 
 jobs:
   detect-ci-trigger:
@@ -37,7 +37,7 @@ jobs:
   cache-pixi-lock:
     uses: ./.github/workflows/cache-pixi-lock.yml
     with:
-      pixi-version: "v0.62.2" # keep in sync with env var above
+      pixi-version: "v0.63.1" # keep in sync with env var above
 
   hypothesis:
     name: Slow Hypothesis Tests
diff --git a/.github/workflows/upstream-dev-ci.yaml b/.github/workflows/upstream-dev-ci.yaml
index a4e2107c10a..28ba8b56863 100644
--- a/.github/workflows/upstream-dev-ci.yaml
+++ b/.github/workflows/upstream-dev-ci.yaml
@@ -17,7 +17,7 @@ concurrency:
 
 env:
   FORCE_COLOR: 3
-  PIXI_VERSION: "v0.62.2"
+  PIXI_VERSION: "v0.63.1"
 
 jobs:
   detect-ci-trigger:
@@ -40,7 +40,7 @@ jobs:
   cache-pixi-lock:
     uses: ./.github/workflows/cache-pixi-lock.yml
     with:
-      pixi-version: "v0.62.2" # keep in sync with env var above
+      pixi-version: "v0.63.1" # keep in sync with env var above
   upstream-dev:
     name: upstream-dev
     runs-on: ubuntu-latest
diff --git a/pixi.toml b/pixi.toml
index 53540d9dd14..550e1c1c520 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -8,7 +8,7 @@ name = "xarray"
 version = "dynamic" # dynamic versioning needs better support in pixi https://github.com/prefix-dev/pixi/issues/2923#issuecomment-2598460666 . Putting `version = "dynamic"` here for now until pixi recommends something else.
 
 [package.build]
-backend = { name = "pixi-build-python", version = "==0.4.0" }
+backend = { name = "pixi-build-python", version = ">=0.4.4" }
 
 [package.host-dependencies]
 setuptools = "*"