diff --git a/dhall-bash-simple.nix b/dhall-bash-simple.nix
index d0de3c5..aab63fe 100644
--- a/dhall-bash-simple.nix
+++ b/dhall-bash-simple.nix
@@ -12,6 +12,10 @@ pkgs.stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/bin
-    install -D -m555 -T dhall-to-bash $out/bin/dhall-to-bash
+    DHALL_TO_BASH=$out/bin/dhall-to-bash
+    install -D -m555 -T dhall-to-bash $DHALL_TO_BASH
+
+    mkdir -p $out/etc/bash_completion.d/
+    $DHALL_TO_BASH --bash-completion-script $DHALL_TO_BASH > $out/etc/bash_completion.d/dhall-to-bash-completion.bash
   '';
 }
diff --git a/dhall-json-simple.nix b/dhall-json-simple.nix
index dddebd7..01b60f7 100644
--- a/dhall-json-simple.nix
+++ b/dhall-json-simple.nix
@@ -12,7 +12,13 @@ pkgs.stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/bin
-    install -D -m555 -T dhall-to-json $out/bin/dhall-to-json
-    install -D -m555 -T dhall-to-yaml $out/bin/dhall-to-yaml
+    DHALL_TO_JSON=$out/bin/dhall-to-json
+    DHALL_TO_YAML=$out/bin/dhall-to-yaml
+    install -D -m555 -T dhall-to-json $DHALL_TO_JSON
+    install -D -m555 -T dhall-to-yaml $DHALL_TO_YAML
+
+    mkdir -p $out/etc/bash_completion.d/
+    $DHALL_TO_JSON --bash-completion-script $DHALL_TO_JSON > $out/etc/bash_completion.d/dhall-to-json-completion.bash
+    $DHALL_TO_YAML --bash-completion-script $DHALL_TO_YAML > $out/etc/bash_completion.d/dhall-to-yaml-completion.bash
   '';
 }
diff --git a/dhall-simple.nix b/dhall-simple.nix
index bab5657..b693377 100644
--- a/dhall-simple.nix
+++ b/dhall-simple.nix
@@ -11,6 +11,10 @@ pkgs.stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/bin
-    install -D -m555 -T dhall $out/bin/dhall
+    DHALL=$out/bin/dhall
+    install -D -m555 -T dhall $DHALL
+
+    mkdir -p $out/etc/bash_completion.d/
+    $DHALL --bash-completion-script $DHALL > $out/etc/bash_completion.d/dhall-completion.bash
   '';
 }
diff --git a/dhall-text-simple.nix b/dhall-text-simple.nix
index 275f42b..33c451e 100644
--- a/dhall-text-simple.nix
+++ b/dhall-text-simple.nix
@@ -12,6 +12,10 @@ pkgs.stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/bin
-    install -D -m555 -T dhall-to-text $out/bin/dhall-to-text
+    DHALL_TO_TEXT=$out/bin/dhall-to-text
+    install -D -m555 -T dhall-to-text $DHALL_TO_TEXT
+
+    mkdir -p $out/etc/bash_completion.d/
+    $DHALL_TO_TEXT --bash-completion-script $DHALL_TO_TEXT > $out/etc/bash_completion.d/dhall-to-text-completion.bash
   '';
 }