diff --git a/recipe/build.sh b/recipe/build.sh
index 0615cac..e3f1baf 100755
--- a/recipe/build.sh
+++ b/recipe/build.sh
@@ -9,3 +9,6 @@ $PYTHON -m conda init --install
 if [[ $(uname -o) == Msys ]]; then
   sed -i "s|CONDA_EXE=.*|CONDA_EXE=\'${PREFIXW//\\/\\\\}\\\\Scripts\\\\conda.exe\'|g" $PREFIX/etc/profile.d/conda.sh
 fi
+
+cd $SP_DIR/conda/common
+cythonize -i _logic.py
diff --git a/recipe/cythonize.patch b/recipe/cythonize.patch
new file mode 100644
index 0000000..86ca117
--- /dev/null
+++ b/recipe/cythonize.patch
@@ -0,0 +1,17 @@
+diff --git a/conda/common/_logic.py b/conda/common/_logic.py
+index 2852bfdbc..55c64cbc3 100644
+--- a/conda/common/_logic.py
++++ b/conda/common/_logic.py
+@@ -669,7 +669,11 @@ class Clauses(object):
+ 
+         lo = 0
+         try0 = 0
+-        for peak in ((True, False) if maxval > 1 else (False,)):
++        if maxval > 1:
++            peaks = (True, False)
++        else:
++            peaks = (False,)
++        for peak in peaks:
+             if peak:
+                 log.trace('Beginning peak minimization')
+                 objval = peak_val
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 113715b..07bef01 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -11,6 +11,7 @@ source:
   sha256: 123fc5b953fb62d85351f9f87b22b3849791d4d9818d790fe66e740058619259
   patches:
     - gh9764.patch
+    - cythonize.patch
 
 build:
   number: 1
@@ -30,6 +31,7 @@ requirements:
     - m2-filesystem                # [win]
     - m2-bash                      # [win]
     - m2-base                      # [win]
+    - {{ compiler('c') }}          # [unix and python_impl=="cpython"]
 
   host:
     - python
@@ -40,6 +42,7 @@ requirements:
     - pip
     - ruamel_yaml >=0.11.14,<0.16
     - setuptools >=31.0.1
+    - cython                       # [unix and python_impl == "cpython"]
   run:
     - python
     - conda-package-handling >=1.3.0