diff --git a/var/spack/repos/builtin/packages/binutils/package.py b/var/spack/repos/builtin/packages/binutils/package.py
index 2271c7cfcc..bf49ca9405 100644
--- a/var/spack/repos/builtin/packages/binutils/package.py
+++ b/var/spack/repos/builtin/packages/binutils/package.py
@@ -32,9 +32,8 @@ class Binutils(Package):
     url      = "https://ftp.gnu.org/gnu/binutils/binutils-2.25.tar.bz2"
 
     version('2.27', '2869c9bf3e60ee97c74ac2a6bf4e9d68')
-    # 2.26 is incompatible with py-pillow build for some reason.
     version('2.26', '64146a0faa3b411ba774f47d41de239f')
-    version('2.25', 'd9f3303f802a5b6b0bb73a335ab89d66', preferred=True)
+    version('2.25', 'd9f3303f802a5b6b0bb73a335ab89d66')
     version('2.24', 'e0f71a7b2ddab0f8612336ac81d9636b')
     version('2.23.2', '4f8fa651e35ef262edc01d60fb45702e')
     version('2.20.1', '2b9dc8f2b7dbd5ec5992c6e29de0b764')
diff --git a/var/spack/repos/builtin/packages/py-pillow/package.py b/var/spack/repos/builtin/packages/py-pillow/package.py
index 1d8b3faa6f..211e3b4199 100644
--- a/var/spack/repos/builtin/packages/py-pillow/package.py
+++ b/var/spack/repos/builtin/packages/py-pillow/package.py
@@ -32,7 +32,7 @@ class PyPillow(Package):
     capabilities."""
 
     homepage = "https://python-pillow.org/"
-    url      = "https://pypi.python.org/packages/source/P/Pillow/Pillow-3.0.0.tar.gz"
+    url = "https://pypi.python.org/packages/source/P/Pillow/Pillow-3.0.0.tar.gz"
 
     # TODO: This version should be deleted once the next release comes out.
     # TODO: It fixes a bug that prevented us from linking to Tk/Tcl.
diff --git a/var/spack/repos/builtin/packages/py-scipy/package.py b/var/spack/repos/builtin/packages/py-scipy/package.py
index cab516e1df..83a69c5682 100644
--- a/var/spack/repos/builtin/packages/py-scipy/package.py
+++ b/var/spack/repos/builtin/packages/py-scipy/package.py
@@ -28,7 +28,7 @@
 class PyScipy(Package):
     """Scientific Library for Python."""
     homepage = "http://www.scipy.org/"
-    url      = "https://pypi.python.org/packages/source/s/scipy/scipy-0.15.0.tar.gz"
+    url = "https://pypi.python.org/packages/source/s/scipy/scipy-0.15.0.tar.gz"
 
     version('0.17.0', '5ff2971e1ce90e762c59d2cd84837224')
     version('0.15.1', 'be56cd8e60591d6332aac792a5880110')
@@ -36,6 +36,8 @@ class PyScipy(Package):
 
     extends('python')
     depends_on('py-nose', type='build')
+    # Known not to work with 2.23, 2.25
+    depends_on('binutils@2.26:', type='build')
     depends_on('py-numpy+blas+lapack', type=nolink)
 
     def install(self, spec, prefix):