diff --git a/build-helpers/make-linux-build-docker-inner-part-2.sh b/build-helpers/make-linux-build-docker-inner-part-2.sh
index 1e35a1e1b9949b37f95b05ebeef223c8a5955ff8..035634b16072e0188270abd8736dab99ce31dada 100755
--- a/build-helpers/make-linux-build-docker-inner-part-2.sh
+++ b/build-helpers/make-linux-build-docker-inner-part-2.sh
@@ -23,6 +23,10 @@ git clone --recursive git://github.com/inducer/loopy
 cd loopy
 
 grep -v pyopencl requirements.txt > myreq.txt
+
+# needed for pyinstaller package to be usable
+echo packaging >> myreq.txt
+
 pip install -r myreq.txt
 python setup.py install
 
diff --git a/requirements.txt b/requirements.txt
index a3e88cfea99e7413211c35d11464932f98e23758..97c2024764715d0a715520800e2e1dd467183479 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,4 @@ git+https://github.com/inducer/codepy.git
 git+https://github.com/inducer/f2py
 
 # Optional, needed for using the C preprocessor on Fortran
-ply>=3.6
-
-# This is needed for the pyinstaller executable to be usable.
-packaging
+ply>=3.6
\ No newline at end of file