ci: remove shell hook

Fixes darwin job.

ci/build.yml

@@ -114,7 +114,7 @@ core unix frozen regular darwin:
   when: manual
   script:
     - . $HOME/.nix-profile/etc/profile.d/nix.sh
-    - nix-shell --run "cd core && make build_unix_frozen"
+    - nix-shell --run "pipenv sync && cd core && pipenv run make build_unix_frozen"
     - mkdir -p TrezorEmu-$CI_COMMIT_SHORT_SHA.app/Contents/{MacOS,libs}
     - cp -v core/build/unix/micropython TrezorEmu-$CI_COMMIT_SHORT_SHA.app/Contents/MacOS/TrezorEmu-$CI_COMMIT_SHORT_SHA
     - dylibbundler -of -b -i /usr/lib/system -d TrezorEmu-$CI_COMMIT_SHORT_SHA.app/Contents/libs -x TrezorEmu-$CI_COMMIT_SHORT_SHA.app/Contents/MacOS/TrezorEmu-$CI_COMMIT_SHORT_SHA

shell.nix

@@ -38,8 +38,4 @@ stdenv.mkDerivation {
   ];
   LD_LIBRARY_PATH = "${libffi}/lib:${libjpeg.out}/lib:${libusb1}/lib:${libressl.out}/lib";
   NIX_ENFORCE_PURITY = 0;
-  shellHook = ''
-    pipenv shell
-    exit
-  '';
 }