diff --git a/spectral-clustering.cabal b/spectral-clustering.cabal
--- a/spectral-clustering.cabal
+++ b/spectral-clustering.cabal
@@ -1,5 +1,5 @@
 name:                spectral-clustering
-version:             0.2.1.1
+version:             0.2.1.2
 synopsis:            Library for spectral clustering.
 description:         Spectral clustering of a matrix.
 homepage:            http://github.com/GregorySchwartz/spectral-clustering#readme
@@ -21,7 +21,7 @@
                      , Math.Clustering.Spectral.Eigen.AdjacencyMatrix
   build-depends:       base >= 4.7 && < 5
                      , clustering
-                     , eigen
+                     , eigen == 3.3.4.1
                      , hmatrix
                      , hmatrix-svdlibc
                      , mwc-random
diff --git a/src/Math/Clustering/Spectral/Eigen/FeatureMatrix.hs b/src/Math/Clustering/Spectral/Eigen/FeatureMatrix.hs
--- a/src/Math/Clustering/Spectral/Eigen/FeatureMatrix.hs
+++ b/src/Math/Clustering/Spectral/Eigen/FeatureMatrix.hs
@@ -31,7 +31,6 @@
 import qualified Numeric.LinearAlgebra as H
 import qualified Numeric.LinearAlgebra.Devel as H
 import qualified Numeric.LinearAlgebra.SVD.SVDLIBC as SVD
-import Debug.Trace
 
 -- Local