diff --git a/bin/install b/bin/install
index 14a3105..419157e 100755
--- a/bin/install
+++ b/bin/install
@@ -58,13 +58,13 @@ omf_install() {
     die "Could not clone the repository → ${OMF_PATH}:${OMF_REPO_BRANCH}"
   fi
 
-  local git_rev=$(git -C ${OMF_PATH} rev-parse HEAD) >/dev/null 2>&1
-  local git_upstream=$(git -C ${OMF_PATH} config remote.upstream.url)
+  local git_rev=$(git --git-dir ${OMF_PATH}/.git --work-tree ${OMF_PATH} rev-parse HEAD) >/dev/null 2>&1
+  local git_upstream=$(git --git-dir ${OMF_PATH}/.git --work-tree ${OMF_PATH} config remote.upstream.url)
 
   if [ -z "${git_upstream}" ]; then
-    git -C ${OMF_PATH} remote add upstream ${git_uri}
+    git --git-dir ${OMF_PATH}/.git --work-tree ${OMF_PATH} remote add upstream ${git_uri}
   else
-    git -C ${OMF_PATH} remote set-url upstream ${git_uri}
+    git --git-dir ${OMF_PATH}/.git --work-tree ${OMF_PATH} remote set-url upstream ${git_uri}
   fi
 
   echo "Oh My Fish revision id → ${git_rev}"
diff --git a/pkg/omf/cli/omf.repo.pull.fish b/pkg/omf/cli/omf.repo.pull.fish
index 837d8d7..2c0c0a2 100644
--- a/pkg/omf/cli/omf.repo.pull.fish
+++ b/pkg/omf/cli/omf.repo.pull.fish
@@ -3,46 +3,46 @@ function omf.repo.pull
     echo (omf::err)"Argument of omf.repo.pull is the repo path."(omf::off)
     return $OMF_MISSING_ARG
   end
-  set -l git_dir $argv[1]
+  set -l repo_dir $argv[1]
 
-  if test (command git -C "$git_dir" config --get remote.upstream.url)
+  if test (command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" config --get remote.upstream.url)
     set repository upstream
   else
     set repository origin
   end
 
-  set initial_branch (command git -C "$git_dir" symbolic-ref -q --short HEAD); or return $OMF_UNKNOWN_ERR
-  set initial_revision (command git -C "$git_dir" rev-parse -q --verify HEAD); or return $OMF_UNKNOWN_ERR
+  set initial_branch (command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" symbolic-ref -q --short HEAD); or return $OMF_UNKNOWN_ERR
+  set initial_revision (command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" rev-parse -q --verify HEAD); or return $OMF_UNKNOWN_ERR
 
-  if not command git -C "$git_dir" diff --quiet
+  if not command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" diff --quiet
     echo (omf::em)"Stashing your changes:"(omf::off)
-    command git -C "$git_dir" status --short --untracked-files
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" status --short --untracked-files
 
-    command git -C "$git_dir" stash save --include-untracked --quiet
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" stash save --include-untracked --quiet
     set stashed true
   end
 
   if test "$initial_branch" != master
-    command git -C "$git_dir" checkout master --quiet
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" checkout master --quiet
   end
 
   # the refspec ensures that '$repository/master' gets updated
-  command git -C "$git_dir" pull --rebase --quiet $repository "refs/heads/master:refs/remotes/$repository/master"
+  command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" pull --rebase --quiet $repository "refs/heads/master:refs/remotes/$repository/master"
   if test $status -eq 2 #SIGINT
-    command git -C "$git_dir" checkout $initial_branch
-    command git -C "$git_dir" reset --hard $initial_revision
-    test "$stashed" = true; and command git -C "$git_dir" stash pop
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" checkout $initial_branch
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" reset --hard $initial_revision
+    test "$stashed" = true; and command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" stash pop
   end
 
   if test "$initial_branch" != master
-    command git -C "$git_dir" checkout $initial_branch --quiet
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" checkout $initial_branch --quiet
   end
 
   if test "$stashed" = true
-    command git -C "$git_dir" stash pop --quiet
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" stash pop --quiet
 
     echo (omf::em)"Restored your changes:"(omf::off)
-    command git -C "$git_dir" status --short --untracked-files
+    command git --git-dir "$repo_dir"/.git --work-tree "$repo_dir" status --short --untracked-files
   end
 
   return 0