diff --git a/pkgs/applications/science/misc/sasview/default.nix b/pkgs/applications/science/misc/sasview/default.nix
index d45eae1ac1f5..d0a4f74924c5 100644
--- a/pkgs/applications/science/misc/sasview/default.nix
+++ b/pkgs/applications/science/misc/sasview/default.nix
@@ -1,9 +1,27 @@
 {lib, fetchgit, gcc, python}:
 
+let
+  xhtml2pdf = import ./xhtml2pdf.nix { inherit lib;
+    fetchPypi = python.pkgs.fetchPypi;
+    buildPythonPackage = python.pkgs.buildPythonPackage;
+    html5lib = python.pkgs.html5lib;
+    httplib2 = python.pkgs.httplib2;
+    nose = python.pkgs.nose;
+    pillow = python.pkgs.pillow;
+    pypdf2 = python.pkgs.pypdf2;
+    reportlab = python.pkgs.reportlab;
+};
+
+in
+
 python.pkgs.buildPythonApplication rec {
-  name = "sasview-${version}";
+  pname = "sasview";
   version = "4.1.2";
 
+  buildInputs = with python.pkgs; [
+    pytest
+    unittest-xml-reporting];
+
   propagatedBuildInputs = with python.pkgs; [
     bumps
     gcc
@@ -17,13 +35,11 @@ python.pkgs.buildPythonApplication rec {
     pillow
     pylint
     pyopencl
-    pytest
     reportlab
     sasmodels
     scipy
     six
     sphinx
-    unittest-xml-reporting
     wxPython
     xhtml2pdf];
 
@@ -34,7 +50,6 @@ python.pkgs.buildPythonApplication rec {
   };
 
   patches = [./pyparsing-fix.patch ./local_config.patch];
-  sandbox = true;
 
   meta = {
     homepage = https://www.sasview.org;
diff --git a/pkgs/development/python-modules/xhtml2pdf/default.nix b/pkgs/applications/science/misc/sasview/xhtml2pdf.nix
similarity index 96%
rename from pkgs/development/python-modules/xhtml2pdf/default.nix
rename to pkgs/applications/science/misc/sasview/xhtml2pdf.nix
index 51b00390dc27..0b3d438843da 100644
--- a/pkgs/development/python-modules/xhtml2pdf/default.nix
+++ b/pkgs/applications/science/misc/sasview/xhtml2pdf.nix
@@ -12,7 +12,6 @@ let
 in
 
 buildPythonPackage rec {
-  name = "${pname}-${version}";
   pname = "xhtml2pdf";
   version = "0.2.1";
 
diff --git a/pkgs/development/python-modules/bumps/default.nix b/pkgs/development/python-modules/bumps/default.nix
index f7ba5f3626c1..51d3d9e6833e 100644
--- a/pkgs/development/python-modules/bumps/default.nix
+++ b/pkgs/development/python-modules/bumps/default.nix
@@ -1,7 +1,6 @@
 { stdenv, buildPythonPackage, fetchPypi, six}:
 
 buildPythonPackage rec {
-  name = "${pname}-${version}";
   pname = "bumps";
   version = "0.7.6";
 
diff --git a/pkgs/development/python-modules/periodictable/default.nix b/pkgs/development/python-modules/periodictable/default.nix
new file mode 100644
index 000000000000..e77c281e2c49
--- /dev/null
+++ b/pkgs/development/python-modules/periodictable/default.nix
@@ -0,0 +1,20 @@
+{lib, fetchPypi, buildPythonPackage, numpy, pyparsing}:
+
+buildPythonPackage rec{
+  pname = "periodictable";
+  version = "1.5.0";
+
+  propagatedBuildInputs = [numpy pyparsing];
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1cjk6aqcz41nxm4fpriz01vqdafd6g57cjk0wh1iklk5cx6c085h";
+  };
+
+  meta = {
+    homepage = http://www.reflectometry.org/danse/software.html;
+    description = "an extensible periodic table of the elements prepopulated with data important to neutron and x-ray scattering experiments";
+    license = lib.licenses.publicDomain;
+    maintainers = with lib.maintainers; [ rprospero ];
+  };
+}
diff --git a/pkgs/development/python-modules/sasmodels/default.nix b/pkgs/development/python-modules/sasmodels/default.nix
index 06e9adf197a9..d33de9c2a73a 100644
--- a/pkgs/development/python-modules/sasmodels/default.nix
+++ b/pkgs/development/python-modules/sasmodels/default.nix
@@ -1,10 +1,11 @@
 {lib, fetchgit, buildPythonPackage, pytest, numpy, scipy, matplotlib, docutils}:
 
 buildPythonPackage rec {
-  name = "sasmodels-${version}";
+  pname = "sasmodels";
   version = "0.96";
 
-  propagatedBuildInputs = [docutils matplotlib numpy pytest scipy];
+  buildInputs = [pytest];
+  propagatedBuildInputs = [docutils matplotlib numpy scipy];
 
   preCheck = ''export HOME=$(mktemp -d)'';
 
diff --git a/pkgs/development/python-modules/unittest-xml-reporting/default.nix b/pkgs/development/python-modules/unittest-xml-reporting/default.nix
new file mode 100644
index 000000000000..129ad0ded6c7
--- /dev/null
+++ b/pkgs/development/python-modules/unittest-xml-reporting/default.nix
@@ -0,0 +1,23 @@
+{lib, fetchPypi, buildPythonPackage, six}:
+
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "unittest-xml-reporting";
+  version = "2.1.1";
+
+  propagatedBuildInputs = [six];
+
+  # The tarball from Pypi doesn't actually contain the unit tests
+  doCheck = false;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1jwkqx5gfphkymp3xwqvlb94ng22gpbqh36vbbnsrpk1a0mammm6";
+  };
+  meta = with lib; {
+    homepage = https://github.com/xmlrunner/unittest-xml-reporting/tree/master/;
+    description = "A unittest runner that can save test results to XML files";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ rprospero ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ba9e1ab88a14..e2cd2743d523 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12278,25 +12278,7 @@ in {
     };
   };
 
-  periodictable = buildPythonPackage rec{
-    name = "${pname}-${version}";
-    pname = "periodictable";
-    version = "1.5.0";
-
-    propagatedBuildInputs = with self; [numpy pyparsing];
-
-    src = fetchPypi {
-      inherit pname version;
-      sha256 = "1cjk6aqcz41nxm4fpriz01vqdafd6g57cjk0wh1iklk5cx6c085h";
-    };
-
-    meta = {
-      homepage = http://www.reflectometry.org/danse/software.html;
-      description = "an extensible periodic table of the elements prepopulated with data important to neutron and x-ray scattering experiments";
-      license = licenses.publicDomain;
-      maintainers = with maintainers; [ rprospero ];
-    };
-  };
+    periodictable = callPackage ../development/python-modules/periodictable { };
 
   pg8000 = buildPythonPackage rec {
     name = "pg8000-1.10.1";
@@ -17353,30 +17335,9 @@ in {
     };
   };
 
-  unittest-xml-reporting = buildPythonPackage rec {
-    name = "${pname}-${version}";
-    pname = "unittest-xml-reporting";
-    version = "2.1.1";
+    unittest-xml-reporting = callPackage ../development/python-modules/unittest-xml-reporting { };
 
-    propagatedBuildInputs = with self; [six];
-
-    # The tarball from Pypi doesn't actually contain the unit tests
-    doCheck = false;
-
-    src = fetchPypi {
-      inherit pname version;
-      sha256 = "1jwkqx5gfphkymp3xwqvlb94ng22gpbqh36vbbnsrpk1a0mammm6";
-    };
-    meta = with stdenv.lib; {
-      homepage = https://github.com/xmlrunner/unittest-xml-reporting/tree/master/;
-      description = "A unittest runner that can save test results to XML files";
-      license = licenses.bsd2;
-      maintainers = with maintainers; [ rprospero ];
-    };
-  };
-
-
-  uritemplate_py = buildPythonPackage rec {
+    uritemplate_py = buildPythonPackage rec {
     name = "uritemplate.py-${version}";
     version = "0.3.0";
 
@@ -17902,8 +17863,6 @@ EOF
     propagatedBuildInputs = with self; [ eventlib application ];
   };
 
-  xhtml2pdf = callPackage ../development/python-modules/xhtml2pdf {};
-
   xlib = buildPythonPackage (rec {
     name = "xlib-${version}";
     version = "0.17";