diff --git a/pkgs/applications/version-management/git-and-tools/git/default.nix b/pkgs/applications/version-management/git-and-tools/git/default.nix
index fbb57a658120..7ba69a9fc182 100644
--- a/pkgs/applications/version-management/git-and-tools/git/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation {
       # Install git-subtree.
       pushd contrib/subtree
       make
-      make install install-doc
+      make install ${stdenv.lib.optionalString withManual "install-doc"}
       popd
       rm -rf contrib/subtree
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6108ae0501b7..0117122c0892 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4023,6 +4023,10 @@ let
 
   nix-exec = callPackage ../development/interpreters/nix-exec {
     nix = nixUnstable;
+    git = git.override {
+      withManual = false;
+      pythonSupport = false;
+    };
   };
 
   octave = callPackage ../development/interpreters/octave {