printing individual parts causes the whole score to print too

[Ryan Michael]

So I have the following seperate .ly file: 

\include "eiertanz-1.ly"

\header {

  instrument = "Violin"

}

{

 \violinOne

}

Which prints the variable which points to the Voice violinOne defined in "eiertanz-1.ly"

however the whole score prints and then the single voice is printed. How Can I only print the violin part? 

Here is the skeleton of eiertanz-1.ly

global= {

 

  \key c \major

}

\header{

    title = "My thing piece"

    composer = ""

   }

violinOne = \new Voice {

}

cello = \new Voice {

  % etc%

}

\score {

  \new StaffGroup <<

    \new Staff << \global \violinOne >>

    \new Staff << \global \cello >>

  >>

  \layout { }

  \midi { }

}

--

ॐ नमः शिवाय