diff --git a/.github/workflows/upkeep.yml b/.github/workflows/upkeep.yml
index 0de5ab6..0e8e75d 100644
--- a/.github/workflows/upkeep.yml
+++ b/.github/workflows/upkeep.yml
@@ -122,7 +122,7 @@ jobs:
           echo '{ allowUnfree = true; cudaSupport = true; cudaCapabilities = ["8.0"]; }' > ~/.config/nixpkgs/config.nix
       - name: Check current package version
         run: |
-          PRE_VERSION="$(nix eval --raw --file . python39Packages.flax.version)"
+          PRE_VERSION="$(nix eval --raw --file . python3Packages.flax.version)"
           echo "Current version: $PRE_VERSION"
           echo "PRE_VERSION=$PRE_VERSION" >> $GITHUB_ENV
         working-directory: "./nixpkgs"
@@ -130,7 +130,7 @@ jobs:
           GH_TOKEN: "${{ secrets.GH_TOKEN }}"
         name: build canary
         run: |
-          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python39Packages.flax
+          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python3Packages.flax
         working-directory: "./nixpkgs-upkeep"
   ipython:
     runs-on: ubuntu-latest
@@ -430,7 +430,7 @@ jobs:
           echo '{ allowUnfree = true; cudaSupport = true; cudaCapabilities = ["8.0"]; }' > ~/.config/nixpkgs/config.nix
       - name: Check current package version
         run: |
-          PRE_VERSION="$(nix eval --raw --file . python39Packages.optax.version)"
+          PRE_VERSION="$(nix eval --raw --file . python3Packages.optax.version)"
           echo "Current version: $PRE_VERSION"
           echo "PRE_VERSION=$PRE_VERSION" >> $GITHUB_ENV
         working-directory: "./nixpkgs"
@@ -438,7 +438,7 @@ jobs:
           GH_TOKEN: "${{ secrets.GH_TOKEN }}"
         name: build canary
         run: |
-          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python39Packages.optax
+          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python3Packages.optax
         working-directory: "./nixpkgs-upkeep"
   pandas:
     runs-on: ubuntu-latest
@@ -717,7 +717,7 @@ jobs:
           echo '{ allowUnfree = true; cudaSupport = true; cudaCapabilities = ["8.0"]; }' > ~/.config/nixpkgs/config.nix
       - name: Check current package version
         run: |
-          PRE_VERSION="$(nix eval --raw --file . python39Packages.tensorflow-bin.version)"
+          PRE_VERSION="$(nix eval --raw --file . python3Packages.tensorflow-bin.version)"
           echo "Current version: $PRE_VERSION"
           echo "PRE_VERSION=$PRE_VERSION" >> $GITHUB_ENV
         working-directory: "./nixpkgs"
@@ -725,7 +725,7 @@ jobs:
           GH_TOKEN: "${{ secrets.GH_TOKEN }}"
         name: build canary
         run: |
-          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python39Packages.tensorflow-bin
+          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python3Packages.tensorflow-bin
         working-directory: "./nixpkgs-upkeep"
   tensorflow-datasets:
     runs-on: ubuntu-latest
@@ -761,7 +761,7 @@ jobs:
           echo '{ allowUnfree = true; cudaSupport = true; cudaCapabilities = ["8.0"]; }' > ~/.config/nixpkgs/config.nix
       - name: Check current package version
         run: |
-          PRE_VERSION="$(nix eval --raw --file . python39Packages.tensorflow-datasets.version)"
+          PRE_VERSION="$(nix eval --raw --file . python3Packages.tensorflow-datasets.version)"
           echo "Current version: $PRE_VERSION"
           echo "PRE_VERSION=$PRE_VERSION" >> $GITHUB_ENV
         working-directory: "./nixpkgs"
@@ -769,7 +769,7 @@ jobs:
           GH_TOKEN: "${{ secrets.GH_TOKEN }}"
         name: build canary
         run: |
-          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python39Packages.tensorflow-datasets
+          GH_TOKEN=$GH_TOKEN ./canary.py --nixpkgs ../nixpkgs --attr python3Packages.tensorflow-datasets
         working-directory: "./nixpkgs-upkeep"
   torch:
     runs-on: ubuntu-latest
diff --git a/upkeep.dhall b/upkeep.dhall
index 43e176b..e190576 100644
--- a/upkeep.dhall
+++ b/upkeep.dhall
@@ -181,14 +181,14 @@ let createPR =
 in  { jobs =
       { augmax = basicCanary "python3Packages.augmax"
       , einops = basicCanary "python3Packages.einops"
-      , flax = basicCanary "python39Packages.flax"
+      , flax = basicCanary "python3Packages.flax"
       , ipython = basicCanary "python3Packages.ipython"
       , jax = basicCanary "python3Packages.jax"
       , jaxlib = basicCanary "python3Packages.jaxlib"
       , jaxlib-bin = basicCanary "python3Packages.jaxlib-bin"
       , jaxlibWithCuda = basicCanary "python3Packages.jaxlibWithCuda"
       , matplotlib = basicCanary "python3Packages.matplotlib"
-      , optax = basicCanary "python39Packages.optax"
+      , optax = basicCanary "python3Packages.optax"
       , pandas = basicCanary "python3Packages.pandas"
       , plexamp = Job::{
         , steps =
@@ -238,8 +238,8 @@ in  { jobs =
               ]
         }
       , tensorflow = basicCanary "python3Packages.tensorflow"
-      , tensorflow-bin = basicCanary "python39Packages.tensorflow-bin"
-      , tensorflow-datasets = basicCanary "python39Packages.tensorflow-datasets"
+      , tensorflow-bin = basicCanary "python3Packages.tensorflow-bin"
+      , tensorflow-datasets = basicCanary "python3Packages.tensorflow-datasets"
       , tqdm = basicCanary "python3Packages.tqdm"
       , torchvision = basicCanary "python3Packages.torchvision"
       , vscode = Job::{