diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for nix-thunk
 
+## 0.7.0.1
+
+* Support GHC 9.6
+
 ## 0.7.0.0
 
 * Caching now works
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -75,6 +75,20 @@
 { which = self.callCabal2nix "which" sources.which {}; }
 ```
 
+You can also access subfolders of a thunk. For example:
+
+```nix
+{
+  imports = [ "${builtins.fetchTarball <some-tar-url>}/path/to/subfolder" ];
+}
+```
+becomes
+```
+{
+  imports = [ "${nix-thunk.thunkSource <thunk-location>}/path/to/subfolder>" ];
+}
+```
+
 ## Contributing
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. See the [contribution guide](CONTRIBUTING.md) for more details.
 
diff --git a/nix-thunk.cabal b/nix-thunk.cabal
--- a/nix-thunk.cabal
+++ b/nix-thunk.cabal
@@ -1,6 +1,6 @@
 cabal-version:      >=1.10
 name:               nix-thunk
-version:            0.7.0.0
+version:            0.7.0.1
 license:            BSD3
 license-file:       LICENSE
 copyright:          Obsidian Systems LLC 2020-2022
@@ -9,7 +9,7 @@
 bug-reports:        https://github.com/obsidiansystems/nix-thunk
 synopsis:           Lightweight dependency management with Nix
 description:
-  nix-thunk lets you manage source code depencies in a lightweight and reproducible way, using Nix.  Each source repository is represented by a stub directory, which refers to the original Git repository.  nix-thunk can easily update these dependencies.
+  nix-thunk lets you manage source code dependencies in a lightweight and reproducible way, using Nix.  Each source repository is represented by a stub directory, which refers to the original Git repository.  nix-thunk can easily update these dependencies.
   .
   If you need to make improvements to the original repositories, nix-thunk can unpack them in-place, so that changes can be tested right away, and then pack them back up when you're done.  This makes it easy to send a pull request to the upstream repo while your project continues on a fork, then switch back to upstream once your pull request has been merged.
 
@@ -31,30 +31,30 @@
   default-language: Haskell2010
   ghc-options:      -Wall
   build-depends:
-      aeson                 >=1.4.4.0  && <1.6
+      aeson                 >=1.4.4.0  && <2.3
     , aeson-pretty          >=0.8.7    && <0.9
-    , base                  >=4.12.0.0 && <4.15
-    , bytestring            >=0.10.8.2 && <0.11
+    , base                  >=4.12.0.0 && <4.19
+    , bytestring            >=0.10.8.2 && <0.12
     , cli-extras            >=0.2.1.0  && <0.3
     , cli-git               >=0.2.0.0  && <0.3
     , cli-nix               >=0.2.0.0  && <0.3
     , containers            >=0.6.0.1  && <0.7
-    , cryptonite            >=0.25     && <0.30
+    , cryptonite            >=0.25     && <0.31
     , data-default          >=0.7.1.1  && <0.8
     , directory             >=1.3.3.0  && <1.4
     , either                >=5.0.1.1  && <5.1
     , exceptions            >=0.10.3   && <0.11
     , extra                 >=1.6.18   && <1.8
     , filepath              >=1.4.2.1  && <1.5
-    , github                >=0.25     && <0.28
+    , github                >=0.25     && <0.30
     , here                  >=1.2.13   && <1.3
-    , lens                  >=4.17.1   && <4.20
-    , logging-effect        >=1.3.4    && <1.4
-    , megaparsec            >=7.0.5    && <9.1
-    , memory                >=0.14     && <0.16
+    , lens                  >=4.17.1   && <5.4
+    , logging-effect        >=1.3.4    && <1.5
+    , megaparsec            >=7.0.5    && <9.7
+    , memory                >=0.14     && <0.19
     , modern-uri            >=0.3.1.0  && <0.4
     , monad-logger          >=0.3.30   && <0.4
-    , mtl                   >=2.2.2    && <2.3
+    , mtl                   >=2.2.2    && <2.4
     , optparse-applicative  >=0.14.3.0 && <0.17
     , temporary             >=1.3      && <1.4
     , text                  >=1.2.3.1  && <1.3
@@ -67,7 +67,7 @@
   main-is:          src-bin/nix-thunk.hs
   default-language: Haskell2010
   build-depends:
-      base                  >=4.12.0.0 && <4.15
+      base                  >=4.12.0.0 && <4.19
     , cli-extras            >=0.2.1.0  && <0.3
     , nix-thunk
     , optparse-applicative  >=0.14.3.0 && <0.17
diff --git a/src/Nix/Thunk/Internal.hs b/src/Nix/Thunk/Internal.hs
--- a/src/Nix/Thunk/Internal.hs
+++ b/src/Nix/Thunk/Internal.hs
@@ -35,6 +35,7 @@
 import Control.Monad.Except
 import Control.Monad.Extra (findM)
 import Control.Monad.Fail (MonadFail)
+import Control.Monad.IO.Class (MonadIO(liftIO))
 import Control.Monad.Log (MonadLog)
 import Crypto.Hash (Digest, HashAlgorithm, SHA1, digestFromByteString)
 import Data.Aeson ((.=))