diff --git a/Dockerfile b/Dockerfile
index d874271d5..0d696da17 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG VERSION=master
 
 # base build stage
 FROM ubuntu:lunar AS build0
-ARG GO=1.20.7
+ARG GO=1.20.8
 ARG GO_DIST=go${GO}.linux-amd64.tar.gz
 
 ADD https://go.dev/dl/$GO_DIST ./
@@ -47,11 +47,12 @@ WORKDIR ${BUILD_PATH}
 
 # install deps
 RUN apt-get -q update && apt-get -q install --no-install-recommends -y \
-    gcc \
+    build-essential \
     libopus-dev \
     libsdl2-dev \
     libvpx-dev \
     libyuv-dev \
+    libjpeg-turbo8-dev \
     libx264-dev \
     pkg-config \
 && rm -rf /var/lib/apt/lists/*
diff --git a/README.md b/README.md
index d1d837ad7..db4e23cfb 100644
--- a/README.md
+++ b/README.md
@@ -61,13 +61,13 @@ a better sense of performance.
 
 ```
 # Ubuntu / Windows (WSL2)
-apt-get install -y make gcc pkg-config libvpx-dev libx264-dev libopus-dev libsdl2-dev libyuv-dev
+apt-get install -y make gcc pkg-config libvpx-dev libx264-dev libopus-dev libsdl2-dev libyuv-dev libjpeg-turbo8-dev
 
 # MacOS
 brew install pkg-config libvpx x264 opus sdl2 jpeg-turbo
 
 # Windows (MSYS2)
-pacman -Sy --noconfirm --needed git make mingw-w64-x86_64-{gcc,pkgconf,dlfcn,libvpx,opus,x264-git,SDL2,libyuv}
+pacman -Sy --noconfirm --needed git make mingw-w64-x86_64-{gcc,pkgconf,dlfcn,libvpx,opus,x264-git,SDL2,libyuv,libjpeg-turbo}
 ```
 
 Because the coordinator and workers need to run simultaneously. Workers connect to the coordinator.
diff --git a/pkg/config/config.yaml b/pkg/config/config.yaml
index 30737b082..59a123bfa 100644
--- a/pkg/config/config.yaml
+++ b/pkg/config/config.yaml
@@ -1,5 +1,20 @@
 # The main config file
 
+# Note.
+# Be aware that when this configuration is being overwritten
+# by another configuration, any empty nested part
+# in the further configurations will reset (empty out) all the values.
+# For example:
+# the main config              second config       result
+# ...                          ...                 ...
+# list:                        list:               list:
+#   gba:                         gba:                gba:
+#     lib: mgba_libretro                               lib: ""
+#     roms: [ "gba", "gbc" ]                           roms: []
+# ...                                              ...
+#
+# So do not leave empty nested keys.
+
 # for the compatibility purposes
 version: 3
 
diff --git a/pkg/config/emulator.go b/pkg/config/emulator.go
index dda7b4865..f7d71fc36 100644
--- a/pkg/config/emulator.go
+++ b/pkg/config/emulator.go
@@ -60,6 +60,7 @@ type LibretroCoreConfig struct {
 }
 
 type CoreInfo struct {
+	Id      string
 	Name    string
 	AltRepo bool
 }
@@ -101,8 +102,8 @@ func (e Emulator) GetSupportedExtensions() []string {
 }
 
 func (l *LibretroConfig) GetCores() (cores []CoreInfo) {
-	for _, core := range l.Cores.List {
-		cores = append(cores, CoreInfo{Name: core.Lib, AltRepo: core.AltRepo})
+	for k, core := range l.Cores.List {
+		cores = append(cores, CoreInfo{Id: k, Name: core.Lib, AltRepo: core.AltRepo})
 	}
 	return
 }
diff --git a/pkg/encoder/yuv/libyuv/libyuv.go b/pkg/encoder/yuv/libyuv/libyuv.go
index 8bde0ad89..8eba7a31b 100644
--- a/pkg/encoder/yuv/libyuv/libyuv.go
+++ b/pkg/encoder/yuv/libyuv/libyuv.go
@@ -3,7 +3,8 @@
 package libyuv
 
 /*
-#cgo !darwin LDFLAGS: -lyuv
+#cgo !darwin,!st LDFLAGS: -lyuv
+#cgo !darwin,st LDFLAGS: -l:libyuv.a -l:libjpeg.a -lstdc++
 
 #cgo darwin CFLAGS: -DINCLUDE_LIBYUV_VERSION_H_
 #cgo darwin LDFLAGS: -L${SRCDIR} -lstdc++
diff --git a/pkg/worker/caged/libretro/manager/http.go b/pkg/worker/caged/libretro/manager/http.go
index 1f2dbc881..728261812 100644
--- a/pkg/worker/caged/libretro/manager/http.go
+++ b/pkg/worker/caged/libretro/manager/http.go
@@ -116,14 +116,24 @@ func (m *Manager) download(cores []config.CoreInfo) (failed []string) {
 	if len(cores) == 0 || m.repo == nil {
 		return
 	}
-	var prime, second []string
+	var prime, second, fail []string
 	for _, n := range cores {
+		if n.Name == "" {
+			fail = append(fail, n.Id)
+			continue
+		}
 		if !n.AltRepo {
 			prime = append(prime, n.Name)
 		} else {
 			second = append(second, n.Name)
 		}
 	}
+
+	if len(prime) == 0 && len(second) == 0 {
+		m.log.Warn().Msgf("[core-dl] couldn't find info for %v cores, check the config", fail)
+		return
+	}
+
 	m.log.Info().Msgf("[core-dl] <<< download | main: %v | alt: %v", prime, second)
 	primeFails := m.down(prime, m.repo)
 	if len(primeFails) > 0 && m.altRepo != nil {