Merge pull request #72347 from NixOS/bash-no-undef-vars

treewide: `set -u` everywhere

44 files changed, 60 insertions, 60 deletions

diff --git a/pkgs/development/compilers/adoptopenjdk-bin/jdk-darwin-base.nix b/pkgs/development/compilers/adoptopenjdk-bin/jdk-darwin-base.nix
index 03857627952d..3b9cb752b9b8 100644
--- a/pkgs/development/compilers/adoptopenjdk-bin/jdk-darwin-base.nix
+++ b/pkgs/development/compilers/adoptopenjdk-bin/jdk-darwin-base.nix
@@ -37,7 +37,7 @@ let cpuName = stdenv.hostPlatform.parsed.cpu.name;
 
     # Set JAVA_HOME automatically.
     cat <<EOF >> $out/nix-support/setup-hook
-    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
     EOF
   '';
 
diff --git a/pkgs/development/compilers/adoptopenjdk-bin/jdk-linux-base.nix b/pkgs/development/compilers/adoptopenjdk-bin/jdk-linux-base.nix
index 509050209fb2..fe38f2b21633 100644
--- a/pkgs/development/compilers/adoptopenjdk-bin/jdk-linux-base.nix
+++ b/pkgs/development/compilers/adoptopenjdk-bin/jdk-linux-base.nix
@@ -54,7 +54,7 @@ let result = stdenv.mkDerivation rec {
 
     # Set JAVA_HOME automatically.
     cat <<EOF >> "$out/nix-support/setup-hook"
-    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
     EOF
   '';
 
diff --git a/pkgs/development/compilers/graalvm/default.nix b/pkgs/development/compilers/graalvm/default.nix
index 61e3b6c16aee..5108ce185449 100644
--- a/pkgs/development/compilers/graalvm/default.nix
+++ b/pkgs/development/compilers/graalvm/default.nix
@@ -270,7 +270,7 @@ in rec {
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
     '';
     postFixup = openjdk.postFixup or null;
diff --git a/pkgs/development/compilers/graalvm/enterprise-edition.nix b/pkgs/development/compilers/graalvm/enterprise-edition.nix
index 84cb38aa8d11..e180455cb7cd 100644
--- a/pkgs/development/compilers/graalvm/enterprise-edition.nix
+++ b/pkgs/development/compilers/graalvm/enterprise-edition.nix
@@ -72,7 +72,7 @@ let
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/11.nix b/pkgs/development/compilers/openjdk/11.nix
index 57911f2d58e6..e365b9b28b35 100644
--- a/pkgs/development/compilers/openjdk/11.nix
+++ b/pkgs/development/compilers/openjdk/11.nix
@@ -106,7 +106,7 @@ let
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out/lib/openjdk; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out/lib/openjdk; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/8.nix b/pkgs/development/compilers/openjdk/8.nix
index 1a5848cd1a68..ff3d03321e21 100644
--- a/pkgs/development/compilers/openjdk/8.nix
+++ b/pkgs/development/compilers/openjdk/8.nix
@@ -231,7 +231,7 @@ let
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out/lib/openjdk; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out/lib/openjdk; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/darwin/11.nix b/pkgs/development/compilers/openjdk/darwin/11.nix
index 4c808302b4fa..0b659b95aa8b 100644
--- a/pkgs/development/compilers/openjdk/darwin/11.nix
+++ b/pkgs/development/compilers/openjdk/darwin/11.nix
@@ -44,7 +44,7 @@ let
 
       # Set JAVA_HOME automatically.
       cat <<EOF >> $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/darwin/8.nix b/pkgs/development/compilers/openjdk/darwin/8.nix
index d2fef9bb4812..bc7a33932b27 100644
--- a/pkgs/development/compilers/openjdk/darwin/8.nix
+++ b/pkgs/development/compilers/openjdk/darwin/8.nix
@@ -44,7 +44,7 @@ let
 
       # Set JAVA_HOME automatically.
       cat <<EOF >> $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/darwin/default.nix b/pkgs/development/compilers/openjdk/darwin/default.nix
index 58e4ba990149..c954a8e2cf85 100644
--- a/pkgs/development/compilers/openjdk/darwin/default.nix
+++ b/pkgs/development/compilers/openjdk/darwin/default.nix
@@ -44,7 +44,7 @@ let
 
       # Set JAVA_HOME automatically.
       cat <<EOF >> $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/openjdk/default.nix b/pkgs/development/compilers/openjdk/default.nix
index 094bd57e6e98..03121daf961f 100644
--- a/pkgs/development/compilers/openjdk/default.nix
+++ b/pkgs/development/compilers/openjdk/default.nix
@@ -114,7 +114,7 @@ let
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out/lib/openjdk; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out/lib/openjdk; fi
       EOF
     '';
 
diff --git a/pkgs/development/compilers/oraclejdk/jdk-linux-base.nix b/pkgs/development/compilers/oraclejdk/jdk-linux-base.nix
index e80d81dc5a00..2f1e827a26a5 100644
--- a/pkgs/development/compilers/oraclejdk/jdk-linux-base.nix
+++ b/pkgs/development/compilers/oraclejdk/jdk-linux-base.nix
@@ -156,7 +156,7 @@ let result = stdenv.mkDerivation rec {
 
     # Set JAVA_HOME automatically.
     cat <<EOF >> $out/nix-support/setup-hook
-    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
     EOF
   '';
 
diff --git a/pkgs/development/compilers/rust/setup-hook.sh b/pkgs/development/compilers/rust/setup-hook.sh
index 7078ec7060b9..5d4eb642fec0 100644
--- a/pkgs/development/compilers/rust/setup-hook.sh
+++ b/pkgs/development/compilers/rust/setup-hook.sh
@@ -1,4 +1,4 @@
 # Fix 'failed to open: /homeless-shelter/.cargo/.package-cache' in rust 1.36.
-if [[ -z $IN_NIX_SHELL && -z $CARGO_HOME ]]; then
+if [[ -z ${IN_NIX_SHELL-} && -z ${CARGO_HOME-} ]]; then
     export CARGO_HOME=$TMPDIR
 fi
diff --git a/pkgs/development/compilers/zulu/8.nix b/pkgs/development/compilers/zulu/8.nix
index d4caabc6cb83..d05ec1a682aa 100644
--- a/pkgs/development/compilers/zulu/8.nix
+++ b/pkgs/development/compilers/zulu/8.nix
@@ -58,7 +58,7 @@ in stdenv.mkDerivation {
 
     # Set JAVA_HOME automatically.
     cat <<EOF >> $out/nix-support/setup-hook
-    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
     EOF
   '';
 
diff --git a/pkgs/development/compilers/zulu/default.nix b/pkgs/development/compilers/zulu/default.nix
index 5f345c87355f..5fe2473bac6d 100644
--- a/pkgs/development/compilers/zulu/default.nix
+++ b/pkgs/development/compilers/zulu/default.nix
@@ -55,7 +55,7 @@ in stdenv.mkDerivation {
 
     # Set JAVA_HOME automatically.
     cat <<EOF >> $out/nix-support/setup-hook
-    if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out; fi
+    if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
     EOF
   '';
 
diff --git a/pkgs/development/interpreters/python/hooks/flit-build-hook.sh b/pkgs/development/interpreters/python/hooks/flit-build-hook.sh
index 48295dc36430..45893aae00f4 100644
--- a/pkgs/development/interpreters/python/hooks/flit-build-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/flit-build-hook.sh
@@ -9,7 +9,7 @@ flitBuildPhase () {
     echo "Finished executing flitBuildPhase"
 }
 
-if [ -z "$dontUseFlitBuild" ] && [ -z "$buildPhase" ]; then
+if [ -z "${dontUseFlitBuild-}" ] && [ -z "${buildPhase-}" ]; then
     echo "Using flitBuildPhase"
     buildPhase=flitBuildPhase
 fi
diff --git a/pkgs/development/interpreters/python/hooks/pip-build-hook.sh b/pkgs/development/interpreters/python/hooks/pip-build-hook.sh
index c297bfffb1e2..a58c01ce808c 100644
--- a/pkgs/development/interpreters/python/hooks/pip-build-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/pip-build-hook.sh
@@ -31,7 +31,7 @@ pipShellHook() {
     echo "Finished executing pipShellHook"
 }
 
-if [ -z "$dontUsePipBuild" ] && [ -z "$buildPhase" ]; then
+if [ -z "${dontUsePipBuild-}" ] && [ -z "${buildPhase-}" ]; then
     echo "Using pipBuildPhase"
     buildPhase=pipBuildPhase
 fi
diff --git a/pkgs/development/interpreters/python/hooks/pip-install-hook.sh b/pkgs/development/interpreters/python/hooks/pip-install-hook.sh
index f528ec63cb8e..4eefe22d3f28 100644
--- a/pkgs/development/interpreters/python/hooks/pip-install-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/pip-install-hook.sh
@@ -18,7 +18,7 @@ pipInstallPhase() {
     echo "Finished executing pipInstallPhase"
 }
 
-if [ -z "$dontUsePipInstall" ] && [ -z "$installPhase" ]; then
+if [ -z "${dontUsePipInstall-}" ] && [ -z "${installPhase-}" ]; then
     echo "Using pipInstallPhase"
     installPhase=pipInstallPhase
 fi
diff --git a/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh b/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
index 24510b9f9931..18f05b6d218c 100644
--- a/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
@@ -43,7 +43,7 @@ function pytestCheckPhase() {
     echo "Finished executing pytestCheckPhase"
 }
 
-if [ -z "$dontUsePytestCheck" ] && [ -z "$installCheckPhase" ]; then
+if [ -z "${dontUsePytestCheck-}" ] && [ -z "${installCheckPhase-}" ]; then
     echo "Using pytestCheckPhase"
     preDistPhases+=" pytestCheckPhase"
 fi
diff --git a/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook.sh b/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook.sh
index e9065cf17934..374a2eddb407 100644
--- a/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook.sh
@@ -5,6 +5,6 @@ pythonCatchConflictsPhase() {
     @pythonInterpreter@ @catchConflicts@
 }
 
-if [ -z "$dontUsePythonCatchConflicts" ]; then
+if [ -z "${dontUsePythonCatchConflicts-}" ]; then
     preDistPhases+=" pythonCatchConflictsPhase"
 fi
diff --git a/pkgs/development/interpreters/python/hooks/python-imports-check-hook.sh b/pkgs/development/interpreters/python/hooks/python-imports-check-hook.sh
index 7e2b3f69d6dd..0fc55145a8eb 100644
--- a/pkgs/development/interpreters/python/hooks/python-imports-check-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/python-imports-check-hook.sh
@@ -10,7 +10,7 @@ pythonImportsCheckPhase () {
     fi
 }
 
-if [ -z "$dontUsePythonImportsCheck" ]; then
+if [ -z "${dontUsePythonImportsCheck-}" ]; then
     echo "Using pythonImportsCheckPhase"
     preDistPhases+=" pythonImportsCheckPhase"
 fi
diff --git a/pkgs/development/interpreters/python/hooks/python-remove-bin-bytecode-hook.sh b/pkgs/development/interpreters/python/hooks/python-remove-bin-bytecode-hook.sh
index 960de767be79..2add23f23165 100644
--- a/pkgs/development/interpreters/python/hooks/python-remove-bin-bytecode-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/python-remove-bin-bytecode-hook.sh
@@ -12,6 +12,6 @@ pythonRemoveBinBytecodePhase () {
     fi
 }
 
-if [ -z "$dontUsePythonRemoveBinBytecode" ]; then
+if [ -z "${dontUsePythonRemoveBinBytecode-}" ]; then
     preDistPhases+=" pythonRemoveBinBytecodePhase"
 fi
diff --git a/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh b/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
index 322a0336df2c..2aec92793825 100644
--- a/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh
@@ -36,12 +36,12 @@ setuptoolsShellHook() {
     echo "Finished executing setuptoolsShellHook"
 }
 
-if [ -z "$dontUseSetuptoolsBuild" ] && [ -z "$buildPhase" ]; then
+if [ -z "${dontUseSetuptoolsBuild-}" ] && [ -z "${buildPhase-}" ]; then
     echo "Using setuptoolsBuildPhase"
     buildPhase=setuptoolsBuildPhase
 fi
 
-if [ -z "$dontUseSetuptoolsShellHook" ] && [ -z "$shellHook" ]; then
+if [ -z "${dontUseSetuptoolsShellHook-}" ] && [ -z "${shellHook-}" ]; then
     echo "Using setuptoolsShellHook"
     shellHook=setuptoolsShellHook
 fi
diff --git a/pkgs/development/interpreters/python/hooks/setuptools-check-hook.sh b/pkgs/development/interpreters/python/hooks/setuptools-check-hook.sh
index 71bb036a91ad..88b7b11931b0 100644
--- a/pkgs/development/interpreters/python/hooks/setuptools-check-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/setuptools-check-hook.sh
@@ -12,7 +12,7 @@ setuptoolsCheckPhase() {
     echo "Finished executing setuptoolsCheckPhase"
 }
 
-if [ -z "$dontUseSetuptoolsCheck" ] && [ -z "$installCheckPhase" ]; then
+if [ -z "${dontUseSetuptoolsCheck-}" ] && [ -z "${installCheckPhase-}" ]; then
     echo "Using setuptoolsCheckPhase"
     preDistPhases+=" setuptoolsCheckPhase"
 fi
diff --git a/pkgs/development/interpreters/python/hooks/wheel-unpack-hook.sh b/pkgs/development/interpreters/python/hooks/wheel-unpack-hook.sh
index 6dd0c5be4cb2..fca808a933ba 100644
--- a/pkgs/development/interpreters/python/hooks/wheel-unpack-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/wheel-unpack-hook.sh
@@ -12,7 +12,7 @@ wheelUnpackPhase(){
     echo "Finished executing wheelUnpackPhase"
 }
 
-if [ -z "$dontUseWheelUnpack" ] && [ -z "$unpackPhase" ]; then
+if [ -z "${dontUseWheelUnpack-}" ] && [ -z "${unpackPhase-}" ]; then
     echo "Using wheelUnpackPhase"
     unpackPhase=wheelUnpackPhase
 fi
diff --git a/pkgs/development/libraries/gettext/gettext-setup-hook.sh b/pkgs/development/libraries/gettext/gettext-setup-hook.sh
index ad3763c29b64..69020146f84d 100644
--- a/pkgs/development/libraries/gettext/gettext-setup-hook.sh
+++ b/pkgs/development/libraries/gettext/gettext-setup-hook.sh
@@ -10,7 +10,7 @@ addEnvHooks "$hostOffset" gettextDataDirsHook
 
 # libintl must be listed in load flags on non-Glibc
 # it doesn't hurt to have it in Glibc either though
-if [ -n "@gettextNeedsLdflags@" -a -z "$dontAddExtraLibs" ]; then
+if [ -n "@gettextNeedsLdflags@" -a -z "${dontAddExtraLibs-}" ]; then
     # See pkgs/build-support/setup-hooks/role.bash
     getHostRole
     export NIX_${role_pre}LDFLAGS+=" -lintl"
diff --git a/pkgs/development/libraries/gtk/hooks/drop-icon-theme-cache.sh b/pkgs/development/libraries/gtk/hooks/drop-icon-theme-cache.sh
index 8f2cb8a334ae..f28a856c4f50 100644
--- a/pkgs/development/libraries/gtk/hooks/drop-icon-theme-cache.sh
+++ b/pkgs/development/libraries/gtk/hooks/drop-icon-theme-cache.sh
@@ -16,4 +16,4 @@ dropIconThemeCache() {
     fi
 }
 
-preFixupPhases="$preFixupPhases dropIconThemeCache"
+preFixupPhases="${preFixupPhases-} dropIconThemeCache"
diff --git a/pkgs/development/libraries/libiconv/setup-hook.sh b/pkgs/development/libraries/libiconv/setup-hook.sh
index f89361a62998..120cf06c61b5 100644
--- a/pkgs/development/libraries/libiconv/setup-hook.sh
+++ b/pkgs/development/libraries/libiconv/setup-hook.sh
@@ -2,7 +2,7 @@
 # it doesn't hurt to have it in Glibc either though
 
 # See pkgs/build-support/setup-hooks/role.bash
-if [ -z "$dontAddExtraLibs" ]; then
+if [ -z "${dontAddExtraLibs-}" ]; then
     getHostRole
     export NIX_${role_pre}LDFLAGS+=" -liconv"
 fi
diff --git a/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh b/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
index c3373983e325..b785a779c8bc 100644
--- a/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
+++ b/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
@@ -31,6 +31,6 @@ qmakeConfigurePhase() {
     runHook postConfigure
 }
 
-if [ -z "$dontUseQmakeConfigure" -a -z "$configurePhase" ]; then
+if [ -z "${dontUseQmakeConfigure-}" -a -z "${configurePhase-}" ]; then
     configurePhase=qmakeConfigurePhase
 fi
diff --git a/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh b/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
index 436c2e1d032a..9f2a9f06f1ab 100644
--- a/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
+++ b/pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh
@@ -61,6 +61,6 @@ postPatchMkspecs() {
         fixQtBuiltinPaths "$dev/mkspecs" '*.pr?'
     fi
 }
-if [ -z "$dontPatchMkspecs" ]; then
-    postPhases="${postPhases}${postPhases:+ }postPatchMkspecs"
+if [ -z "${dontPatchMkspecs-}" ]; then
+    postPhases="${postPhases-}${postPhases:+ }postPatchMkspecs"
 fi
diff --git a/pkgs/development/libraries/qt-5/hooks/wrap-qt-apps-hook.sh b/pkgs/development/libraries/qt-5/hooks/wrap-qt-apps-hook.sh
index d2aadbd956a8..d9e5880289dc 100644
--- a/pkgs/development/libraries/qt-5/hooks/wrap-qt-apps-hook.sh
+++ b/pkgs/development/libraries/qt-5/hooks/wrap-qt-apps-hook.sh
@@ -64,10 +64,10 @@ qtOwnPathsHook() {
 
 preFixupPhases+=" qtOwnPathsHook"
 
-# Note: $qtWrapperArgs still gets defined even if $dontWrapQtApps is set.
+# Note: $qtWrapperArgs still gets defined even if ${dontWrapQtApps-} is set.
 wrapQtAppsHook() {
     # skip this hook when requested
-    [ -z "$dontWrapQtApps" ] || return 0
+    [ -z "${dontWrapQtApps-}" ] || return 0
 
     # guard against running multiple times (e.g. due to propagation)
     [ -z "$wrapQtAppsHookHasRun" ] || return 0
diff --git a/pkgs/development/node-packages/node-env.nix b/pkgs/development/node-packages/node-env.nix
index 670556bf271a..7cc212c41bd6 100644
--- a/pkgs/development/node-packages/node-env.nix
+++ b/pkgs/development/node-packages/node-env.nix
@@ -363,7 +363,7 @@ let
 
         npm ${forceOfflineFlag} --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild
 
-        if [ "$dontNpmInstall" != "1" ]
+        if [ "''${dontNpmInstall-}" != "1" ]
         then
             # NPM tries to download packages even when they already exist if npm-shrinkwrap is used.
             rm -f npm-shrinkwrap.json
diff --git a/pkgs/development/python-modules/pythonnet/default.nix b/pkgs/development/python-modules/pythonnet/default.nix
index 9bcbaf3e6f72..f916ec63b30b 100644
--- a/pkgs/development/python-modules/pythonnet/default.nix
+++ b/pkgs/development/python-modules/pythonnet/default.nix
@@ -43,8 +43,8 @@ buildPythonPackage rec {
   '';
 
   preConfigure = ''
-    [ -z "$dontPlacateNuget" ] && placate-nuget.sh
-    [ -z "$dontPlacatePaket" ] && placate-paket.sh
+    [ -z "''${dontPlacateNuget-}" ] && placate-nuget.sh
+    [ -z "''${dontPlacatePaket-}" ] && placate-paket.sh
   '';
 
   nativeBuildInputs = [
diff --git a/pkgs/development/ruby-modules/gem/default.nix b/pkgs/development/ruby-modules/gem/default.nix
index 7b92a586b54c..af38160a5fa2 100644
--- a/pkgs/development/ruby-modules/gem/default.nix
+++ b/pkgs/development/ruby-modules/gem/default.nix
@@ -99,7 +99,7 @@ stdenv.mkDerivation ((builtins.removeAttrs attrs ["source"]) // {
     runHook preUnpack
 
     if [[ -