diff --git a/nix/artiq-dev.nix b/nix/artiq-dev.nix
index 709607f25..479352d2c 100644
--- a/nix/artiq-dev.nix
+++ b/nix/artiq-dev.nix
@@ -1,7 +1,6 @@
-{runScript ? "bash", extraProfile ? ""}:
+{ pkgs ? import <nixpkgs> {}}:
 
 let 
-  pkgs = import <nixpkgs> {};
   artiqpkgs = import ./default.nix { inherit pkgs; };
 in
   pkgs.buildFHSUserEnv {
@@ -30,8 +29,7 @@ in
         openocd
       ])
     );
-    runScript = runScript;
     profile = ''
       export TARGET_AR=${artiqpkgs.binutils-or1k}/bin/or1k-linux-ar
-    '' + extraProfile;
+    '';
   }
diff --git a/nix/conda-build.nix b/nix/conda-build.nix
index c333b9e04..6780ff3c7 100644
--- a/nix/conda-build.nix
+++ b/nix/conda-build.nix
@@ -1,12 +1,6 @@
-# nix-build -E "with import <nixpkgs> {}; callPackage ./conda-build.nix {}"
+{ pkgs ? import <nixpkgs> {}}:
 
-{ stdenv
-, fetchurl
-, runCommand
-, buildFHSUserEnv
-, libselinux
-, xorg
-}:
+with pkgs;
 
 let
   condaDeps = [ stdenv.cc xorg.libSM xorg.libICE xorg.libXrender libselinux ];
diff --git a/nix/release.nix b/nix/release.nix
index 7c65a6454..e67ba467b 100644
--- a/nix/release.nix
+++ b/nix/release.nix
@@ -1,9 +1,8 @@
 { pkgs ? import <nixpkgs> {}}:
-with pkgs;
 let
-  artiqPkgs = import ./default.nix {};
+  artiqPkgs = import ./default.nix { inherit pkgs; };
   jobs = rec {
-    conda-artiq = callPackage ./conda-build.nix {};
+    conda-artiq = import ./conda-build.nix { inherit pkgs; };
   } // artiqPkgs;
 in
   jobs
diff --git a/nix/shell-dev.nix b/nix/shell-dev.nix
index ee2e8a764..d7ff9a076 100644
--- a/nix/shell-dev.nix
+++ b/nix/shell-dev.nix
@@ -1,4 +1,6 @@
+{ pkgs ? import <nixpkgs> {}}:
+
 let
-  artiq-dev = import ./artiq-dev.nix {};
+  artiq-dev = import ./artiq-dev.nix { inherit pkgs; };
 in
   artiq-dev.env