diff --git a/ci/test.sh b/ci/test.sh
index 68e132ef0..6ad9e3655 100755
--- a/ci/test.sh
+++ b/ci/test.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -p bash -i bash -p python3Packages.mypy -p python3Packages.black -p python3Packages.flake8
+#!nix-shell -p bash -i bash -p python3Packages.mypy -p python3Packages.black -p python3Packages.flake8 -p nix
 
 set -eux -o pipefail # Exit with nonzero exit code if anything fails
 
diff --git a/ci/update-nur-search.sh b/ci/update-nur-search.sh
index 1412e0698..dc8958315 100755
--- a/ci/update-nur-search.sh
+++ b/ci/update-nur-search.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -p git -p bash -i bash
+#!nix-shell -p git -p nix -p bash -i bash
 
 set -eu -o pipefail # Exit with nonzero exit code if anything fails
 
diff --git a/ci/update-nur.sh b/ci/update-nur.sh
index 9d137bfc1..130a3fd8f 100755
--- a/ci/update-nur.sh
+++ b/ci/update-nur.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -p git -p bash -i bash
+#!nix-shell -p git -p nix -p bash -i bash
 
 set -eu -o pipefail # Exit with nonzero exit code if anything fails