diff --git a/build/pkgs/flit_core/checksums.ini b/build/pkgs/flit_core/checksums.ini
index cf7f0bb2b55..b93e9200816 100644
--- a/build/pkgs/flit_core/checksums.ini
+++ b/build/pkgs/flit_core/checksums.ini
@@ -1,5 +1,5 @@
-tarball=flit_core-VERSION.tar.gz
-sha1=05d6d7a3df5bdbd9df1b37a65662e5dbe94f23fd
-md5=3bc52f1952b9a78361114147da63c35b
-cksum=1703912415
-upstream_url=https://pypi.io/packages/source/f/flit_core/flit_core-VERSION.tar.gz
+tarball=flit_core-VERSION-py3-none-any.whl
+sha1=cf044db53e986d0735ad708cce9eba0b71684168
+md5=c817750ae741d8f720b173a30f7b2085
+cksum=1810686358
+upstream_url=https://pypi.io/packages/py3/f/flit_core/flit_core-VERSION-py3-none-any.whl
diff --git a/build/pkgs/flit_core/spkg-install.in b/build/pkgs/flit_core/spkg-install.in
deleted file mode 100644
index 8d6f80f4cc7..00000000000
--- a/build/pkgs/flit_core/spkg-install.in
+++ /dev/null
@@ -1,3 +0,0 @@
-cd src
-# We use --no-deps to suppress a warning regarding tomli.
-sdh_pip_install --no-deps .
diff --git a/build/pkgs/packaging/SPKG.rst b/build/pkgs/packaging/SPKG.rst
index c9333698503..753be5162eb 100644
--- a/build/pkgs/packaging/SPKG.rst
+++ b/build/pkgs/packaging/SPKG.rst
@@ -5,3 +5,12 @@ Description
 -----------
 
 Core utilities for Python packages
+
+License
+-------
+
+Upstream Contact
+----------------
+
+https://pypi.org/project/packaging/
+
diff --git a/build/pkgs/packaging/checksums.ini b/build/pkgs/packaging/checksums.ini
index 7d9afce62d3..3ee369817f0 100644
--- a/build/pkgs/packaging/checksums.ini
+++ b/build/pkgs/packaging/checksums.ini
@@ -1,5 +1,5 @@
-tarball=packaging-VERSION.tar.gz
-sha1=603cbd6e3416f1f4b6c0f924216f96fe67d9f6da
-md5=d54eeff8c7ca86980528f4132f258d54
-cksum=307392791
-upstream_url=https://pypi.io/packages/source/p/packaging/packaging-VERSION.tar.gz
+tarball=packaging-VERSION-py3-none-any.whl
+sha1=d3fb436d835b252ea884a5d172d7265220127f95
+md5=f6e9c6af858bd34eff07b407d3f650a1
+cksum=3531019080
+upstream_url=https://pypi.io/packages/py3/p/packaging/packaging-VERSION-py3-none-any.whl
diff --git a/build/pkgs/packaging/dependencies b/build/pkgs/packaging/dependencies
index b63b7e33635..644ad35f773 100644
--- a/build/pkgs/packaging/dependencies
+++ b/build/pkgs/packaging/dependencies
@@ -1,4 +1,4 @@
- | flit_core pip $(PYTHON)
+ | pip $(PYTHON)
 
 ----------
 All lines of this file are ignored except the first.
diff --git a/build/pkgs/packaging/spkg-install.in b/build/pkgs/packaging/spkg-install.in
deleted file mode 100644
index dd9cb64a082..00000000000
--- a/build/pkgs/packaging/spkg-install.in
+++ /dev/null
@@ -1 +0,0 @@
-cd src && sdh_pip_install --build-isolation .
diff --git a/build/pkgs/pyparsing/SPKG.rst b/build/pkgs/pyparsing/SPKG.rst
index 0b765140901..21635bcae2b 100644
--- a/build/pkgs/pyparsing/SPKG.rst
+++ b/build/pkgs/pyparsing/SPKG.rst
@@ -15,6 +15,5 @@ MIT License
 Upstream Contact
 ----------------
 
-- Author: Paul McGuire
-- Home page: http://pyparsing.wikispaces.com
+https://pypi.org/project/pyparsing/
 
diff --git a/build/pkgs/pyparsing/checksums.ini b/build/pkgs/pyparsing/checksums.ini
index 1c6d7b9b36b..a6e8820e3c3 100644
--- a/build/pkgs/pyparsing/checksums.ini
+++ b/build/pkgs/pyparsing/checksums.ini
@@ -1,5 +1,5 @@
-tarball=pyparsing-VERSION.tar.gz
-sha1=2e9cf056c36c132f15476dfdd50449d48b48f6a2
-md5=bb8c8c6b8015ca5887ae2c37917ee82e
-cksum=513345755
-upstream_url=https://files.pythonhosted.org/packages/source/p/pyparsing/pyparsing-VERSION.tar.gz
+tarball=pyparsing-VERSION-py3-none-any.whl
+sha1=c44cd9476ad90a48af0f27d8f7966136b2a93fc6
+md5=314b4874edfbc558e02f89d371043e9f
+cksum=3947575213
+upstream_url=https://pypi.io/packages/py3/p/pyparsing/pyparsing-VERSION-py3-none-any.whl
diff --git a/build/pkgs/pyparsing/dependencies b/build/pkgs/pyparsing/dependencies
index 287adef3710..644ad35f773 100644
--- a/build/pkgs/pyparsing/dependencies
+++ b/build/pkgs/pyparsing/dependencies
@@ -1,4 +1,4 @@
- | pip wheel flit_core $(PYTHON)
+ | pip $(PYTHON)
 
 ----------
 All lines of this file are ignored except the first.
diff --git a/build/pkgs/pyparsing/spkg-install.in b/build/pkgs/pyparsing/spkg-install.in
deleted file mode 100644
index 058b1344dc2..00000000000
--- a/build/pkgs/pyparsing/spkg-install.in
+++ /dev/null
@@ -1,3 +0,0 @@
-cd src
-
-sdh_pip_install .
diff --git a/build/pkgs/tomli/checksums.ini b/build/pkgs/tomli/checksums.ini
index c8642848d7f..f2edcb641cb 100644
--- a/build/pkgs/tomli/checksums.ini
+++ b/build/pkgs/tomli/checksums.ini
@@ -1,5 +1,5 @@
-tarball=tomli-VERSION.tar.gz
-sha1=3eae299137c59d6d6d30be01417366c57dd1adf5
-md5=d4341621d423a7ca6822e23d6d52bb9a
-cksum=1285168803
-upstream_url=https://pypi.io/packages/source/t/tomli/tomli-VERSION.tar.gz
+tarball=tomli-VERSION-py3-none-any.whl
+sha1=5bfc83c14bc54e6193a0d50a50c16a88eda0c4fa
+md5=a8a774971c6d046cf1c87cd801dd158f
+cksum=891457836
+upstream_url=https://pypi.io/packages/py3/t/tomli/tomli-VERSION-py3-none-any.whl
diff --git a/build/pkgs/tomli/dependencies b/build/pkgs/tomli/dependencies
index 992761d1f11..644ad35f773 100644
--- a/build/pkgs/tomli/dependencies
+++ b/build/pkgs/tomli/dependencies
@@ -1,4 +1,4 @@
- | pip flit_core $(PYTHON)
+ | pip $(PYTHON)
 
 ----------
 All lines of this file are ignored except the first.
diff --git a/build/pkgs/tomli/spkg-install.in b/build/pkgs/tomli/spkg-install.in
deleted file mode 100644
index 37ac1a53437..00000000000
--- a/build/pkgs/tomli/spkg-install.in
+++ /dev/null
@@ -1,2 +0,0 @@
-cd src
-sdh_pip_install .
diff --git a/build/pkgs/typing_extensions/SPKG.rst b/build/pkgs/typing_extensions/SPKG.rst
index da23c19d36d..861399b66b5 100644
--- a/build/pkgs/typing_extensions/SPKG.rst
+++ b/build/pkgs/typing_extensions/SPKG.rst
@@ -1,10 +1,10 @@
-typing_extensions: Backported and Experimental Type Hints for Python 3.5+
+typing_extensions: Backported and Experimental Type Hints for Python 3.8+
 =========================================================================
 
 Description
 -----------
 
-Backported and Experimental Type Hints for Python 3.5+
+Backported and Experimental Type Hints for Python 3.8+
 
 License
 -------
diff --git a/build/pkgs/typing_extensions/checksums.ini b/build/pkgs/typing_extensions/checksums.ini
index 449824b887b..babfa059d5c 100644
--- a/build/pkgs/typing_extensions/checksums.ini
+++ b/build/pkgs/typing_extensions/checksums.ini
@@ -1,5 +1,5 @@
-tarball=typing_extensions-VERSION.tar.gz
-sha1=ef61789c91d5e9de37c5960c1e6f904e029fbba3
-md5=06e7fff4b1d51f8dc6f49b16e71de54e
-cksum=3833864103
-upstream_url=https://pypi.io/packages/source/t/typing_extensions/typing_extensions-VERSION.tar.gz
+tarball=typing_extensions-VERSION-py3-none-any.whl
+sha1=84d6a73b5a5d303c9187a861d5eedd50da42e7a3
+md5=9c84e613da80ced7a5e86329ec75dc6c
+cksum=2951292774
+upstream_url=https://pypi.io/packages/py3/t/typing_extensions/typing_extensions-VERSION-py3-none-any.whl
diff --git a/build/pkgs/typing_extensions/dependencies b/build/pkgs/typing_extensions/dependencies
index e0e94942dba..644ad35f773 100644
--- a/build/pkgs/typing_extensions/dependencies
+++ b/build/pkgs/typing_extensions/dependencies
@@ -1,4 +1,4 @@
- | flit_core $(PYTHON)
+ | pip $(PYTHON)
 
 ----------
 All lines of this file are ignored except the first.
diff --git a/build/pkgs/typing_extensions/package-version.txt b/build/pkgs/typing_extensions/package-version.txt
index 7c66fca5791..88f181192c4 100644
--- a/build/pkgs/typing_extensions/package-version.txt
+++ b/build/pkgs/typing_extensions/package-version.txt
@@ -1 +1 @@
-4.7.1
+4.8.0
diff --git a/build/pkgs/typing_extensions/spkg-install.in b/build/pkgs/typing_extensions/spkg-install.in
deleted file mode 100644
index 37ac1a53437..00000000000
--- a/build/pkgs/typing_extensions/spkg-install.in
+++ /dev/null
@@ -1,2 +0,0 @@
-cd src
-sdh_pip_install .