bash-3.2$ nix-shell shell.nix -I nixpkgs=/Users/dom/nixpkgs
these derivations will be built:
  /nix/store/9701sn4vbjxgfrn6zgiky495fiyz8xsl-sundials-3.1.0.drv
building path(s) ‘/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0’
unpacking sources
unpacking source archive /nix/store/z0rbcd9cjl5i8mdpk350wwswfgadqhv6-sundials-3.1.0.tar.gz
source root is nas-1.9.4
setting SOURCE_DATE_EPOCH to timestamp 1381168715 of file nas-1.9.4/HISTORY
patching sources
configuring
fixing cmake files...
cmake flags: -DCMAKE_BUILD_TYPE=Release -DCMAKE_SKIP_BUILD_RPATH=ON -DCMAKE_INSTALL_INCLUDEDIR=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0/include -DCMAKE_INSTALL_LIBDIR=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0/lib -DCMAKE_INSTALL_NAME_DIR=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0/lib -DCMAKE_INSTALL_PREFIX=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0 -DCMAKE_INSTALL_PREFIX=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0 -DEXAMPLES_INSTALL_PATH=/nix/store/1m9cicrvhwq27lb8f5hv0pgb3jx9wcs2-sundials-3.1.0/share/examples
CMake Error: The source directory "/tmp/nix-build-sundials-3.1.0.drv-0/nas-1.9.4" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
builder for ‘/nix/store/9701sn4vbjxgfrn6zgiky495fiyz8xsl-sundials-3.1.0.drv’ failed with exit code 1
error: build of ‘/nix/store/9701sn4vbjxgfrn6zgiky495fiyz8xsl-sundials-3.1.0.drv’ failed
/nix/var/nix/profiles/default/bin/nix-shell: failed to build all dependencies