diff --git a/pkgs/tools/text/silver-searcher/bash-completion.patch b/pkgs/tools/text/silver-searcher/bash-completion.patch
new file mode 100644
index 000000000000..30e8c72389b7
--- /dev/null
+++ b/pkgs/tools/text/silver-searcher/bash-completion.patch
@@ -0,0 +1,5 @@
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -9 +9 @@
+-bashcompdir = $(pkgdatadir)/completions
++bashcompdir = $(datadir)/bash-completion/completions
diff --git a/pkgs/tools/text/silver-searcher/default.nix b/pkgs/tools/text/silver-searcher/default.nix
index 51f78cd0d53d..fe890c2916d0 100644
--- a/pkgs/tools/text/silver-searcher/default.nix
+++ b/pkgs/tools/text/silver-searcher/default.nix
@@ -11,17 +11,13 @@ stdenv.mkDerivation rec {
     sha256 = "0wcw4kyivb10m9b173183jrj46a0gisd35yqxi1mr9hw5l5dhkpa";
   };
 
+  patches = [ ./bash-completion.patch ];
+
   NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isLinux "-lgcc_s";
 
   nativeBuildInputs = [ autoreconfHook pkgconfig ];
   buildInputs = [ pcre zlib lzma ];
 
-  postInstall = ''
-    mkdir -p $out/etc/bash_completion.d
-    mv $out/share/the_silver_searcher/completions/ag.bashcomp.sh $out/etc/bash_completion.d
-    rm -r $out/share/the_silver_searcher
-  '';
-
   meta = with stdenv.lib; {
     homepage = https://github.com/ggreer/the_silver_searcher/;
     description = "A code-searching tool similar to ack, but faster";