diff --git a/pkgs/build-support/setup-hooks/gog-unpack.sh b/pkgs/build-support/setup-hooks/gog-unpack.sh
new file mode 100644
index 000000000000..559b543fadfc
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/gog-unpack.sh
@@ -0,0 +1,11 @@
+unpackPhase="unpackGog"
+
+unpackGog() {
+    runHook preUnpackGog
+
+    innoextract --silent --extract --exclude-temp "${src}"
+
+    find . -depth -print -execdir rename -f 'y/A-Z/a-z/' '{}' \;
+
+    runHook postUnpackGog
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 934c7388bccb..74969c98b4df 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -92,6 +92,11 @@ with pkgs;
     { substitutions = { gnu_config = gnu-config;}; }
     ../build-support/setup-hooks/update-autotools-gnu-config-scripts.sh;
 
+  gogUnpackHook = makeSetupHook {
+    name = "gog-unpack-hook";
+    deps = [ innoextract file-rename ]; }
+    ../build-support/setup-hooks/gog-unpack.sh;
+
   buildEnv = callPackage ../build-support/buildenv { }; # not actually a package
 
   buildFHSUserEnv = callPackage ../build-support/build-fhs-userenv { };